The bulletin
Text extracted from the PDF.
FAA Aviation Safety
SPECIAL AIRWORTHINESS
INFORMATION BULLETIN SAIB: NM-10-18 SUBJ: Instruments: Redesigned Aileron Sensors for Flight Data Recorder Date: March 4, 2010 This is information only. Recommendations aren’t mandatory.
Introduction
This Special Airworthiness Information Bulletin (SAIB) advises registered owners and operators of redesigned aileron sensors for the flight data recorder (FDR) installed on ATR - GIE Avions de Transport Regional Model ATR42 and ATR72 airplanes.
Background
Following an incident on a Model ATR72-212 airplane it was determined that the left aileron surface position data recorded by the FDR was invalid. Further investigation revealed that incorporation of Supplemental Type Certificate (STC) ST01310NY or ST01280NY yielded higher-than-expected levels of incorrect aileron surface position data, as reported from the FDR. As a result of this incident, Delta Engineering redesigned the aileron sensors with high cable tension to reduce cable fatigue, and issued Service Bulletin 2301-06397-2030, dated September 26, 2008. The service bulletin provides operators with guidelines for replacing the existing aileron sensors with the new, improved sensors. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Aviation Regulations (14 CFR) part 39.
Recommendations
The FAA recommends that all owners and operators of ATR - GIE Avions de Transport Regional Model ATR42 and ATR72 airplanes comply with the actions outlined in Delta Engineering Service Bulletin 2301-06397-2030, dated September 26, 2008.
For Further Information Contact
Balram Rambrich, Aerospace Engineer, Avionics and Flight Test Branch, ANE-172, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone
(516) 228-7307; fax (516) 794-5531.
For Related Service Information Contact
Delta Engineering, 13 DRBA Way, New Castle, DE 19720; phone: (302) 325-9320; fax:
(302) 325-9420; email: jamoritz@delta-engineering.com.
Registered aircraft it may concern
Registry models matched by ATR GIE Avions de Transport R gional ATR42-200, ATR42-300, ATR42-320 and 8 more, the same way as ADs, with the most registered aircraft first.