Airworthiness Directive · Amendment 39-19621 · Attitude and directional data system
Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System Units
This AD applies to airplanes and helicopters, certificated in any category, with a Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System (AHRS) unit part number (P/N) 145130-2000, 145130-2001, 145130-7000, 145130-7001, or 145130-7100 installed using analog outputs for primary flight information display or autopilot functions without automatic output comparison. Aircraft known to have the subject AHRS units installed include but are not limited to the following:
(1) Dornier Luftfahrt GmbH Model 228-100, 228-101, 228-200, 228-201, 228-202, and 228-212 airplanes;
(2) Learjet Inc. Model 31A airplanes;
(3) Pilatus Aircraft Ltd. Model PC12, PC-12/45, and PC-12/47 airplanes;
(4) Polskie Zaklady Lotnicze Sp. z o.o. Model PZL M28 05 airplanes;
(5) Textron Aviation Inc. (type certificate previously held by Cessna Aircraft Company) Model 560XL airplanes;
(6) Bell Helicopter Textron Canada Limited Model 407 helicopters;
(7) Bell Helicopter Textron Inc. Model 412 and 412EP helicopters; and
(8) Sikorsky Aircraft Corporation Model S-76A, S-76-B, and S-76C helicopters.
We are adopting a new airworthiness directive (AD) for Northrop Grumman LITEF GmbH LCR-100 Attitude and Heading Reference System (AHRS) units installed on various aircraft. This AD requires removing certain LCR-100 AHRS units from service. This AD was prompted by test results showing loss of or invalid data. The actions of this AD are intended to prevent an unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 25 hours time-in-service (TIS), remove the AHRS unit from service.
(2) Removal from service of P/N 145130-7100 terminates the requirements of AD 2010-26-09 (75 FR 81424, December 28, 2010).
(3) Do not install an AHRS unit P/N 145130-2000, 145130-2001, 145130-7000, 145130-7001, or 145130-7100 on any aircraft.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
Appliances and equipment
