SDR ASAA2019070429949

Service difficulty report · Unknown · Boeing 737890

Difficulty date: July 4, 2019
Submitted: July 9, 2019
Operation: Air carrier
Aircraft: N590AS
Make and model: Boeing 737890
Aircraft serial: 35687
Aircraft time: 43,789 hours, 13,166 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Unknown
Condition: Malfunctioned
Location: Apu
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

PER DISPATCH RELEASE DID APU CSS. ATTEMPT # 1 AT 36,000' NO LIGHT OFF. ATTEMPT # 2 DESCENDING THRU FL 320, APU FAULT LIGHT. AFTER LANDING ATTEMPTED APU START, NO START & APU FAULT LIGHT. GROUNDED - YES. AFTER POWER DOWN RESTART APU PER AMM 49-11-00-710-801. OPERATIONAL TEST NORMAL ON GROUND NO FAULTS NOTED. CSS ATTEMPTED FAILED.