Service difficulty report · Brake · Boeing 737990ER

Difficulty date
July 23, 2021
Submitted
July 26, 2021
Operation
Air carrier
Aircraft
N431AS
Make and model
Boeing 737990ER
Aircraft serial
43255
Aircraft time
28,685 hours, 9,221 cycles
Engine
Cfmint CFM567B27E
Part
Brake
Part number
254A12906
Condition
Faulted
Location
Starter Brake
Stage of operation
TX
How discovered
9
Nature of condition
J
Precautionary procedure
O

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

What was found

AFTER BLOCK IN WHEN #2 START LEVER MOVED TO CUTOFF ENG FAIL APPEARED ON THE #2 EGT UNTIL ENG WOUND DOWN THEN EXTINGUISHED. GROUNDED - YES. ACCOMP #2 EEC BITE RECENT FAULTS SHOWS LONG TIME FAULT MSSG 76-11362 ON FLIGHT ZERO ACCOMP EEC TEST TEST PASS REF B737-900 FIM 73-00 TASK 801 #2 ENG DESCRETES, VERIFIED 5 INPUTS IND DO NOT AGREE WITH START LEVER POSITION AFTER IDLE TO CUTOFF SW-XCH SHOWS "?????" ALL OTHERS AGREE. CYCLED BOTH START C/B'S NOW ALL 5 DISCRETE INPUTS AGREE REF FIM 73-05 TASK 805 807. REF FIM 73-05 TASK 805 FOR ACTIVE FAULTS 76-11362 REPLACED #2 ENG START BRAKE ASSEMBLY REF B737-900 AMM 76-11-10-420/010-801-F00 ALL TEST PASS AFTER ENG RUN FAULT 76-11362 NO LONGER ACTIVE ENG DOES NOT SHOW FAIL ON EGT SHUTDOWN.