SDR ASAA0956191

Service difficulty report · Apu · Boeing 737890

Difficulty date: July 10, 2009
Submitted: July 14, 2009
Operation: Air carrier
Aircraft: N577AS
Make and model: Boeing 737890
Aircraft serial: 35186
Aircraft time: 9,071 hours, 2,631 cycles
Engine: Cfmint CFM567B27
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Apu
Condition: Malfunctioned
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

WHILE PERFOMING T/C 08031001 FOUND APU START CONV CB EXTENDED P91 PANEL E AND E COMP. ACFT GROUNDED. PERFORMED APU BITE 49-60 TASK 801. NO MESSAGES FOUND. ACCOMPLISHED FIM TASK 49-40-00-810-810. NO DEFECTS FOUND. GRND RAN APU 2 TIMES NO FAULTS FOUND REF 49-11-00-060-801. RESET CBIAW MM 20 60 01. INSPECTED CB WIRING AT P91 ALL CKS NORMAL. NO HISTORY ON THIS MR.