SDR ABXA020350

Service difficulty report · Pump · Doug DC932

Difficulty date
December 5, 2002
Submitted
January 13, 2003
Operation
Air carrier
Aircraft
N984AX
Make and model
Doug DC932
Aircraft serial
47258
Aircraft time
70,092 hours, 82,780 cycles
Part
Pump
Part number
AS19593B
Part serial
MX127378K
Condition
Failed
Location
Hyd System
Part time
146 hours, 139 cycles
Stage of operation
CR
How discovered
9
Nature of condition
G
Precautionary procedure
A

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

What was found

EMERGENCY DECLARED & DIVERTED. A/C CROSSTIE LOCKOUT, LT AC BUS OFF LDC BUS OFF LT GEN. APU WOULD NOT PICK UP RT SIDE. INSP LT GEN LEADS, CHECKED RESISTANCE ON LT DP CURRENT TRANS (ALL THREE). CHKD 3 CURRENT TRANS FOR LT MAIN SYS. VISUALLY INSP 3 PHASE BUS WIRING. NO DEFECTS NOTED. APU OPS CHKD GOOD. FOUND 50 AMP CB FOR RT AUX. PUMP TRIPPED. INSP WIRING AND RESET. OPS CHECKED GOOD. RAN ENGINE CROSSTIE, OPS CHECKED GOOD. NO DEFECTS NOTED. DEFERRED AS PRECAUTION. S/D: CLEARED DI NR 24863. REPLACED AS PRECAUTION 1 RELAY, 1 PUMP CONTROL SWITCH, 3 CB, AUX. HYD. PUMP ASSY. REPAIR ORDER #501441917 (FOR AUX. HYD. PUMP ASSY.) WAS A CONFIRMED FAILURE. PUMP ASSY HAD HIGH AMPS. UNIT REQUIRED SHIMS IN CONTROL PISTON TO LWR

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