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Helicopters general safety information

SINs, tech pubs, tutorials

As part of its commitment to safety, Airbus Helicopters develops Safety Information Notices and other technical publications to provide customers with valuable information related to the company’s products and services. This section contains some of these documents. Airbus Helicopters customers can consult the entire library of technical publications through the company’s Technical Information Publication on Internet (T.I.P.I) according to their subscription.

General safety resources

European Safety Promotion Network – Rotorcraft

The European Helicopter Safety Team (EHEST) regularly releases guidance to improve helicopter safety. Airbus Helicopters publishes SINS on some of these subjects to impart this knowledge to operators:

- HE2 Helicopter pilot airmanship

- HE3 Off-site landing sites

- HE4 Pilot decision making

- HE5 Risk management in training

- HE6 Advantages of simulators in helicopter flight training

- HE7 Technique for helicopter operations in hilly and mountainous terrain

- HE8 The principles of Threat and Error Management (TEM) for helicopter pilots, instructors and training organisations

- HE9 Automation and flight path management

- HE10 Teaching and testing in flight simulation training devices

- HE11 Training and testing of Emergency and abnormal procedures in Helicopters

- HE12 Helicopter Performance

- HE13 leaflet HE 13 weather threat for VMC flights

- EHEST Helicopter Flight Instructor Guide Download

- Other Safety Promotion leaflets, web-articles, videos, manuals and guidelines by EHEST, ESPN-R (which replaced EHEST in 2017) and IHSF are published on EASA Safety Promotion and

Flight Operations

Fenestron versus Conventional Tail Rotor (CTR) for helicopters equipped with a main rotor rotating counterclockwise when seen from above

Download 3540-I-00-Rev-0 - (PDF 115 Ko)


Fenestron versus Conventional Tail Rotor (CTR) for helicopters equipped with a main rotor rotating clockwise when seen from above 3540-I-00

Download 3539-I-00-Rev-0 - (PDF 539Ko)


Service-Letter concerning the YAW axis control for all helicopters in some flight conditions.

The technical comments in this Service-Letter apply to main rotors rotating clockwise when seen from above.

Download (PDF 78 Ko)


Safety Information Notice for unanticipated left yaw (main rotor rotating clockwise), commonly referred to as LTE
Download (PDF 335 Ko)


Proactive decision-making with Airbus Helicopters’ "Before Your Flight" risk assessment app

Download (PDF 457 Ko)

This Safety Promotion Notice describes the practice of Pre Flight Risk Assessment and the app developed by Airbus Helicopters to support pilots in its application. Available for both iOS and Android environment, you can download the android version here or click on link below:

ESPN-R Hoist Task Force recommendations along with a brief history of the hoist's use in the rotorcraft industry

Download (PDF 4,76 Mo)


Flight Operations Support “Crew Help Desk”

Download (PDF English Version 2 990 Ko)


Reporting of in-service events

Improving flight safety has always been and will always be Airbus Helicopters’ first priority. This constant improvement in safety can only be achieved with the help of all those involved in aviation, through rapid, accurate and exhaustive exchange of information concerning all events considered as abnormal, which have or can potentially have an effect on flight safety.

Download (PDF English Version 564 Ko)


Risk of hypoxia for aircrew and passengers when operating at high altitude

In line with our constant commitment to improving the safety of helicopter operations, Airbus Helicopters would like to share information about the risk of hypoxia when operating at high altitude. This risk should be considered by aircrew and operators within their Safety Management Systems (SMS) according to your operations.

Download (PDF English Version 527 Ko)


Main safety tips to be applied close to or at VNE

Following several events occurring during high speed flights, reported to Airbus Helicopters, it seems necessary to issue a reminder that great care should be taken when flying near or at the speed limit (VNE). It requires higher situation awareness and the pilot's full attention due to the helicopter’s handling qualities near this limit. The following points are not specific to any helicopter type and must be known and understood by flight crews.

Download PDF English Version 540 Ko)


Protection and use of helicopters in cold weather and in damp conditions

The experience gained on our helicopters has revealed some cases of engine flameout or damage occurring shortly after takeoff. The helicopters had previously been subject to cold weather in snowy or rainy conditions, and parked in the open.

Download (PDF English Version 500 Ko)


Spreading of information from the FAA and EASA regarding the use of additional restraint systems for passengers, and from the EASA regarding the use of water surfaces as forced landing areas

Following a fatal helicopter accident on the East River near New York City on March 11, 2018 involving an Airbus Helicopters AS350 B2, Airbus Helicopters would like to inform his customers of the release of a Notice (N8900.457) by the FAA on April 10, 2018 and of two SIBs (2018-15 & 2018-16) by the EASA on September 07, 2018:

Download (PDF English Version 195Ko)


Wearing polarized sunglasses

Airbus Helicopters informs you that wearing polarized sunglasses in flight can have an impact on the good reading of information displayed on the cockpit panel.

Download (PDF English Version 739 Ko)


External load operations

In line with our constant commitment to improving the safety of helicopter operations, Airbus Helicopters would like to share information about some recent accidents which have occurred during sling load operations.

Download (PDF English Version 592 Ko)


Follow-up of recommendations and limitations associated with the use of bucket-type fire-fighting systems

Airbus Helicopters recently participated in several investigations into accidents and serious incidents during fire-fighting operations involving helicopters equipped with Bucket*-type suspended systems installed under STC (Supplemental Type Certificate).

Download (PDF English Version 319 Ko)


Correct use of seats and restraint systems to minimize the risk of injury

Airbus Helicopters has taken part in investigations following incidents/accidents during which it was determined that crew members and/or occupants did not properly use the helicopter’s occupant protection features, including seats and restraint systems, thus causing an increased risk of injury.

Download (PDF English Version 303 Ko)


Vortex Ring State/ Airbus Helicopters training recommendations and considerations about the “Vuichard recovery technique”

Following a publication on how to escape a Vortex Ring State (VRS) with the “Vuichard recovery technique”, Airbus Helicopters believes it is important to explain our position regarding Airbus Helicopters global training philosophy related to VRS and the consequences of the different techniques.

Download (PDF English Version 238 Ko)


Measures to be taken if the hoist jams in operation

The purpose of this revision 1 of this Safety Information Notice is to extend its effectivity to the cabin and cockpit crew.

Download (PDF English Version 155 Ko)


Equipment and furnishings

Usage of data recorded in AIRS (Airborne Image Recorder System) "VISION 1000"

Download (PDF English Version 486 Ko)


Safety advices and tips for pilots returning post COVID-19

With this Safety Promotion Notice Airbus Helicopters would like to give some advices and tips for returning to General Aviation (GA) flying post the COVID-19 crisis.

Download (PDF English Version 211Ko)


A helmet can save your life

This Safety Promotion Notice is a reminder on the recommendations from investigation bodies: wearing helmets significantly increases crew protection.

Download (PDF English Version 577 Ko)


Use of 4-axis digital AFCS

Download SIN3558-S-22-Rev-0 - (PDF English Version 531Ko)


ESPN-R publication: Hoist operator training guide
Download 3626-P-00-Rev-0 - (English Version 2212Ko)

Maintenance / Engineering

Recommendations for work at height

The purpose of this Safety Promotion Notice is to better define and outline work at height practices to ensure that the risk from falling from one level to another is eliminated or minimised "as low as reasonably practicable" (ALARP).



Increasing number of serious incidents/accidents caused by failures to comply with "routine" applicable maintenance instructions 
Download (PDF 163Ko)

Download (PDF 531Ko)


Helicopter operating limitations

Through this Safety Information Notice, EUROCOPTER would like to remind you of the existence of operating limitations of EUROCOPTER helicopters.

Download (PDF English Version 581Ko)

Modifications to the measures to be taken in the event of incidents

Airbus Helicopters has recently reviewed the conditions in which repairs on dynamic assemblies are authorized, in particular if an incident has occurred in operation.

Download (PDF English Version 142Ko)


Human Factors considerations in Maintenance

The purpose of revision 1 of this Safety Promotion Notice is to extend its content to the entire Airbus Helicopters fleet.

Download (PDF English Version 856Ko)


Recommendations regarding portable Ground Power Units (GPU) containing Lithium Ion batteries

This Safety Information Notice (SIN) is to remind operators of the proper use of portable GPUs containing Lithium Ion batteries. Operators should also be aware of the dangers associated with the use, storage, and carriage of Portable GPUs containing Lithium batteries aboard aircraft.

Download  (PDF English Version 375Ko)


Safety risks associated with sales and use of unauthorized/counterfeit Airbus Helicopters parts and helicopters, all models

Revision 1 of this Safety Information Notice is issued following a new case of return to service of an aircraft after rebuilding without Airbus Helicopters’ approval. Therefore, Airbus Helicopters reminds customers of the safety risks related to the purchases and use of non-authorized or counterfeit Airbus Helicopters parts and/or helicopters.

Download (PDF English Version 557Ko)


Falsification of airworthiness documents and documents of conformity with the manufacturer data (New and repaired parts) - PART21 / PART145

EUROCOPTER regularly warns its operators against the use of suspect parts which may jeopardize flight safety and the safety of passengers and goods.

These suspect parts often come with falsified documents which may refer to the brand EUROCOPTER, but also to other manufacturers or companies working in the aircraft industry.

Download (PDF English Version 567Ko)

Enhancing Aviation Safety with proper Maintenance procedures and a Human Factor analysis campaign

The goal of this Safety Promotion Notice is to promote best maintenance practices and organizational standards.

Download (PDF 855,59 Ko)

Hydraulic power system: servo transparency 
Download (PDF125Ko)

Servo-control transparency
Download SIN3287-S-67-Rev-0 - (PDF 174Ko)

EC120 B
Download (PDF 124Kb)

Hydraulic system failure emergency procedure training
EC120 B and AS350 B3e
Download (PDF 523Kb)

Helicopter with single hydraulic system - Hydraulic failure training
Download SIN2630-S-29-Rev-0 - (PDF 59Ko)

Helicopter with single hydraulic power system - Hydraulic failure training
Download SIN3246-S-29-Rev-1 - (PDF 337Ko)

Integration of a non-Airbus Helicopters Group design modification on helicopters, subject or not subject to an STC (Supplemental Type Certificate)
Download (PDF 48Kb)

Jettisonable sliding doors

Design 1 (Disc spring):
Helicopter S/N 9004 up to and including S/N 9621 and pre-Alert Service Bulletin MBB-BK117 C-2-52A-018.
Watch to the tutorial

Design 2 (Coil spring):
Helicopter S/N 9622 and up or post Alert Service Bulletin MBB-BK117 C-2-52A-018.
Watch to the tutorial

Download ASB BK117 C-2-52A-018 (pdf 3.009Ko)

Download SIN 2658-S-52 (PDF 797 Ko)


Recommendations for visual inpections - Huma factor approach

The purpose of this note is to better define and outline the concept of visual inspection to harmonize and standardize the knowledge and the know-how on this very recurrent maintenance action.

Download (PDF English Version 1142 Ko)


Electrical Power

Lithium Battery Safety in Personal Electronic Devices (PED)
Recommendations to operators

Download (PDF English Version 290 Ko)


Fuel System

Recommendation on the usage of Kathon FP1.5 Biocide by DuPont

Download (PDF English Version 844 Ko)


Theft of aeronautical equipment of EUROCOPTER or its customers' property

Complement to EUROCOPTER Safety Information Notice No. 2451-S-00 Revision 0, dated 2012-05-15
Download SIN2497-S-00-Rev-1 - (PDF English Version 68Ko)

For Light Helicopters Range

Simulated Engine-Off Landing (EOL) training

Current helicopter accident/incident statistics indicate that the greatest exposure to accidents or incidents occurs during simulated engine-off landing (EOL). The purpose of this Safety Information Notice is to raise the level of awareness of flight instructors involved in simulated EOL training.
Download (PDF 521 Ko)


AS350, EC130B4 Crash Resistant Fuel System Retrofit Options and compliance with § 27.952

Download SIN3281-S-28-Rev-2 - (PDF English Version 609Ko)


EC120, AS350, AS355, EC130 Reminder for a Safe Departure

Airbus Helicopters is aware of several recent accidents that were due to failure to comply with the Flight Manual (FLM/AFM) procedures and/or due to disregard for basic airmanship and best practices necessary to ensure a safe take-off.

Download (PDF English Version 527Ko)


AS350, EC130, Dauphin, EC120, AG Maintenance operations that can be carried out by an aircrew member - aircraft commander or flight engineer - under EASA regulations

Download (PDF English Version 36Ko)


AS350B3 Engine Controls Use of twist grip

Information Notice 2169-I-67 informed you about the various types of twist grips that exist for AS350 B3 helicopters and explained the differences in handling according to the twist grip version and the engine (Arriel 2B or Arriel 2B1).

Download (PDF english Version 1103Ko)


Rotor Flight Controls Dual Controls

Airbus Helicopters has been informed of a tragic event involving an aircraft in the Ecureuil range, which occurred following a “flight experience” type leisure flight, while the aircraft was on the ground with the rotor spinning.

Download (PDF English Version 543Ko)

Ground Rescue Booklet

In line with our constant commitment to improving the safety of your operations, these new Ground Rescue Booklets for Airbus Helicopters products were developed in collaboration with operators and provide additional information on how to adapt Emergency Response Plans (ERP) within the scope of Safety Management Systems (SMS).

These documents cover generic configurations which may be different from the specific configurations of your helicopters. The booklets will initially be issued in English only and will not be subject to systematic updating. Dedicated versions will be prepared for other helicopters within the Airbus Helicopters range.

These booklets are made available free of charge on the Airbus Helicopters website in order to be used by firefighters and rescue teams around the world.

- H125



EC145/BK117 C-2e


- H155

- H175


Ground Operations

Best practices for helicopters parked on the ground with spinning rotor

Airbus Helicopters recently took part in several investigations following incidents/accidents in which an aircraft took off with no action from the pilot while the aircraft was parked on the ground, with the rotor spinning at flight speed.

Download (PDF English Version 519Ko)


Dangers Associated with Operating a Helicopter on the Ground Without a Qualified Pilot at the Controls

This document updates the information provided in Service Letter 1788-62-06. This Service Letter was originally issued in 2006 after several accidents occurred when pilots left their aircraft operating on the ground, unattended, with the rotors turning.

Download (PDF English Version 63Ko)


SERVICING – Disinfection of the Helicopter Interior and the External handles

Download (PDF English Version)


Possible aviation fuel contamination by FAME or EMAG
Download SIN2478-S-00-REV-0 - (PDF English Version 82Ko)

Safety Management

Collecting information regarding events that might involve potential safety issues is a key aspect of Airbus' effort to continuously improve the safety of its helicopters. This can only be achieved with the help of the aviation community through rapid, accurate and comprehensive information exchanges on events which might potentially affect fleet safety.

With this critical feedback, Airbus analyzes the events to define whether preventative and/or corrective measures are required. Quality and safety are core focuses for Airbus, and the company strongly encourages its customers to report any event considered as abnormal, as described in its “Occurrences Reporting” Information Notice:

HCare contact details

* Phone calls free for the following countries:

Argentina, Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Hong-Kong, Hungary, Ireland, Israel, Italy, Japan, Korea, Luxembourg, New Zealand, Norway, People’s Republic of China, Portugal, Spain, Sweden, Switzerland, The Netherlands, United Kingdom, United States.

Aid to introduction of a Safety Management System (SMS) - Operational risk management methodology provided by Airbus Helicopters

Download (PDF English Version 419Ko)
Download (PDF French Version 342Ko)
Download (PDF German Version 344Ko)
Download (PDF spanish Version 355Ko)

Dauphin Range

In-flight loss of a horizontal stabilizer due to prior damage

The purpose of Revision 1 of this Safety Information Notice is to inform about a new case of break of one side of a horizontal stabilizer, which occurred during landing.

Download (PDF English Version 419Ko)

Visit the website: T.I.P.I.

Accident investigation

General safety information

Counterfeit or destroyed aircraft

Flight Crew Operating Manual

Contact information

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