Airworthiness Directive · Amendment 39-21309 · Attitude and direction data system
Airbus Helicopters
This AD applies to Airbus Helicopters Model AS332C1 and AS332L1 helicopters, certificated in any category, all manufacturer serial numbers, equipped with an Advanced Helicopter Cockpit & Avionics System (AHCAS), except helicopters that have Airbus Helicopters modification 0728576 embodied in production.
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS332C1 and AS332L1 helicopters. This AD was prompted by a report that the affected helicopters use the same "flight/ground" logic signal, instead of independent redundant signals. This AD requires amending the emergency procedures of the existing rotorcraft flight manual (RFM) for your helicopter, a wiring modification of the "flight/ground" logic signal source of the attitude and heading reference system (AHRS) 1, and then removal of the amendment to the existing RFM for your helicopter. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 30 days after the effective date of this AD: Amend the emergency procedures of the existing rotorcraft flight manual (RFM) for your helicopter by inserting the supplemental text specified in figure 1 to paragraph (g)(1) of this AD, immediately following paragraph 9 GROUND/FLIGHT LOGIC FAULT.
(2) Within 100 hours time-in-service or before intentional flight into IMC, whichever occurs first after the effective date of this AD, do the wiring modification of the “flight/ground” logic signal source of the AHRS 1 in accordance with the Accomplishment Instructions of Airbus Helicopters Alert Service Bulletin No. AS332-34.00.60, Revision 1, dated March 29, 2019. After completion of the wiring modification, the RFM amendment required by paragraph (g)(1) of this AD must be removed from the existing RFM for your helicopter.
