SDR ASAA2021091435943

Service difficulty report · Pump · Boeing 737890

Difficulty date: September 14, 2021
Submitted: September 16, 2021
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 48,287 hours, 14,368 cycles
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Part number: 66087
Part serial: 660873745
Condition: Inoperative
Location: Nr Hyd System
Part time: 840 hours, 237 cycles
Stage of operation: IN
How discovered: 9
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

PILOT REPORTS A SYS HYDRAULIC PRESS AT 3300 PSI. GROUNDED - YES. REF B737-800 FIM 29-10 TASK 808 SYS A HYDRAULIC PRESS ABOVE 3200 PSI, REMOVED AND REPLACED SYSTEM PRESSURE TRANSMITTER, PULLED AND RESET 1 BREAKER, REF B737-800 AMM 29-31-12, RAN ENGINE #1 ,A SYS. PRESSURE STILL 3300 PSI. REMOVED & REPLACED ENG #1 ENGINE DRIVEN PUMP HYD REF AMM 29-11-11-000-801-001 & 29-11-11-400-801-001 OPS CHECK GOOD.