Airworthiness Directives; Embraer S.A. Airplanes
We propose to supersede an existing airworthiness directive (AD) that applies to all Model ERJ 190-100 STD, -100 LR, and -100 IGW airplanes; and Model ERJ 190-200 STD, -200 LR, and -200 IGW airplanes. The existing AD currently requires revising the maintenance program to incorporate modifications in the Airworthiness Limitation Section (ALS) of the Embraer S.A. ERJ 190 Maintenance Review Board Report (MRBR). Since we issued that AD, new inspection tasks and their respective thresholds and intervals have been issued. This proposed AD would require revising the maintenance program to incorporate modifications in the Airworthiness Limitation Section (ALS) of the Embraer S.A. ERJ 190 Maintenance Review Board Report (MRBR) to include new inspection tasks and their respective thresholds and intervals. We are proposing this AD since failure to inspect these structural components according to the new ALS tasks, thresholds, and intervals could prevent a timely detection of fatigue cracking, which if not properly addressed, could result in reduced structural integrity of the airplane.
Airworthiness Directives; Fokker Services B.V. Airplanes
We propose to supersede two existing airworthiness directives (AD) that apply to certain Fokker Services B.V. Model F.28 Mark 0100 airplanes. The first existing AD currently requires removing the actuator from the fuel-balance transfer-valve (FBTV) and installing a locking device on the FBTV. The second existing AD currently requires inspecting to verify that the position indicator of the FBTV is in the closed position and deactivating the fuel-balance transfer-system. Since we issued those ADs, we have received reports that the FBTV was inadvertently reactivated after required de-activation measures were undone. This proposed AD would require installing an FBTV locking device. We are proposing this AD to prevent fuel starvation and consequently a double-engine flameout, possibly resulting in a forced landing, damage to the airplane, and injury to occupants.