Service difficulty report · Power Unit · Bombdr BD1001A10

Difficulty date
July 21, 2025
Submitted
July 25, 2025
Operation
Air carrier
Aircraft
N777QS
Make and model
Bombdr BD1001A10
Aircraft serial
20562
Aircraft time
10,314 hours, 5,936 cycles
Part
Power Unit
Part number
17SLAD00004
Part serial
00665
Condition
Faulted
Location
Flap Sys
Stage of operation
AP
How discovered
O
Nature of condition
F, J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING APPROACH, FLAPS 10 WERE SELECTED & THE FLAPS MOVED UNTIL IT INDICATED 2 DEGREES & MOVEMENT STOPPED FOLLOWED BY AMBER CAUTION EICAS MESSAGE FLAPS FAULT & APPROXIMATELY 10 SECONDS LATER, AMBER EICAS MESSAGE FLAPS NORM PRESS LOW ALSO DISPLAYED. QRH GUIDED US TO SELECT FLAPS 0 & FLAPS RETRACTED TO 0. QRH GUIDED US TO SELECT ALTN FLAPS BUT THE FAULTS WERE STILL DISPLAYED & A NO FLAP LANDING PERFORMED. APON LANDING, FLAPS WERE IN THE UP POSITION BUT SEEM TO BE APPROX 1/4 INCH FROM THE FULLY STOWED POSITION. NO CURRENT OR HISTORY FAULTS FOUND IN MDC. ARRIVED AT ACFT & VERIFIED FLAPS WERE NOT IN THE UP POSTION, POWERED ACT & PERFORMED FULL UP RESET PROCEDURE, FLAPS RESET TO 0. PLACED SWITCHES BACK TO NORMAL GROUND RAN BOTH ENGS & PERFORMED SEVERAL OPS CHECKS OF FLAPS, ALL CHECKS SAT. REMOVED FPU DUE TO FLAPS FAULT & FLAP NORM PRESS LOW FAULT. INSPECTED AREAS THAT CANNOT BE ACCESSED AFTER INSTALLATION. NO DEFECTS NOTED. INSTALLED REPAIRED FPU IAW AMM 77-52-33. INSPECTED AREA & ATTACHING HARDWARE & FLUID LINES, NO DEFECTS NOTED, PERFORMED ELECTRICAL RIG CHECK IAW AMM 27-52-00. VERIFIED MECHANICAL RIG TO BE PROPERLY ADJUSTED, NO ACTION REQUIRED, PERFORMED ALL OPS CHECKS & LEAK CHECKS, NO DEFECTS NOTED.