Service difficulty report · Bleed Valve · Boeing 737890

Difficulty date
April 7, 2010
Submitted
April 9, 2010
Operation
Air carrier
Aircraft
N579AS
Make and model
Boeing 737890
Aircraft serial
35187
Aircraft time
11,789 hours, 3,493 cycles
Part
Bleed Valve
Part number
32912142
Part serial
3139
Condition
Defective
Location
Apu
Part time
6,738 hours, 1,983 cycles
Stage of operation
IN
How discovered
O
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

FOUND APU/ CDU "CURRENT STATUS" FAULT49 52240 "HI CURRENT FLOW TO BLEED VALVE" + 25 PAST FLIGHT " OTHER OCCURRENCES" HISTORY. FOUND PIN 1 & 2 TO READ 6 OHMS INSTEAD OF GREATER THAN 20 OHMS PER FIM 49 51 00 AT BLEED AIR VALVE. CHANGED APU BLEED AIR VALVE REF: AMM 49 52 11. APU/ CDU "CURRENT STATUS" CLEARED OUT FAULT:49 52240. ALL FAULT HISTORY CLEARED OUT FROM APU/CDU FAULT PAGES. OPERATED APU BLEED SYS & RAN NR 1 ENG OPS NORMAL.