Tue, Nov 16, 2021
AD 2021-18-17 Adds A New Requirement To Update The Version Of The FCC OPS If Necessary
The FAA is superseding Airworthiness Directive (AD) 2012-21-08, which applied to certain The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes.
AD 2012-21-08 required inspecting for part numbers of the operational program software (OPS) of the flight control computers (FCCs) and installing and testing an updated version of the FCC OPS. This AD was prompted by reports that during autopilot coupled instrument landing system (ILS) approaches, the airplane did not capture or track the glideslope correctly. This AD retains the requirement to inspect for part numbers of the OPS of the FCCs, and adds a new requirement to update the version of the FCC OPS if necessary. This AD also expands the applicability to include The Boeing Company Model 737-900ER series airplanes. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective December 20, 2021.
Supplementary Information: The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2012-21-08, Amendment 39-17224 (77 FR 64711, October 23, 2012) (AD 2012-21-08). AD 2012-21-08 applied to certain The Boeing Company Model 737-600, -700, -700C, -800, and -900 series airplanes. The NPRM published in the Federal Register on February 27, 2020 (85 FR 11319). The NPRM was prompted by reports that during autopilot coupled ILS approaches, the airplane did not capture or track the glideslope correctly. In the NPRM, the FAA proposed to continue to require inspecting for part numbers of the OPS of the FCCs, and to add a new requirement to update the version of the FCC OPS if necessary. The NPRM also proposed to expand the applicability to include The Boeing Company Model 737-900ER series airplanes. The FAA is issuing this AD to address the glideslope capture problem, which could allow the airplane to descend below the glideslope beam and result in controlled flight into
terrain on airplanes that do not have the upgraded FCC OPS installed.
More News
Very High Frequency The frequency band between 30 and 300 MHz. Portions of this band, 108 to 118 MHz, are used for certain NAVAIDs; 118 to 136 MHz are used for civil air/ground voi>[...]
Aero Linx: Aviation Suppliers Association Established February 25, 1993, the Aviation Suppliers Association (ASA), based in Washington, D.C., is a not-for-profit association, repre>[...]
Have A Story That NEEDS To Be Featured On Aero-News? Here’s How To Submit A Story To Our Team Some of the greatest new stories ANN has ever covered have been submitted by our>[...]
From 2021 (YouTube Version): Colorado Campus Offers aVariety Of Aerospace Entertainment And Education Wings over the Rockies Exploration of Flight is the second location for the Wi>[...]
Also: Paramotor Champ's, Electric Ultralight, ICON BK Update, Burt Rutan at Oshkosh! The Popular Rotorcraft Association is reaching out for help in rebuilding their private runway >[...]