SDR ASAA2016050416640

Service difficulty report · Module · Boeing 737990ER

Difficulty date: May 4, 2016
Submitted: May 9, 2016
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 6,295 hours, 2,076 cycles
System (JASC): 4960 · APU Controls
Part: Module
Part number: 38762871
Part serial: GE3766
Condition: Failed
Location: Apu
Part time: 10,808 hours, 18,813 cycles
Stage of operation: LD
How discovered: O
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 LANDING ATTEMPTED, APU START FAILED. INDICATED "FAULT". ACFT GROUNDED. TROUBLESHOOT IAW FIM 49-70, TASK 808, STEP 7 AND STEP 8. REPLACED ECU, REF AMM 49-61-12. REPLACED DATA MEMORY MODULE, REF AMM 49-72-11. OPS TEST NORMAL, GROUND VERIFICATION SUCCESSFUL. THIS CLEARS MEL 49-1B.