SDR AALA2019081209014

Service difficulty report · Pump · Boeing 737823

Difficulty date: August 9, 2019
Submitted: August 12, 2019
Operation: Air carrier
Aircraft: N921AN
Make and model: Boeing 737823
Aircraft serial: 29522
Aircraft time: 59,123 hours, 23,980 cycles
System (JASC): 2913 · Hydraulic Pump (Electric/Engine), Main
Part: Pump
Part number: 887477
Part serial: MX614651
Condition: Overtemp
Location: Hyd System
Stage of operation: TX
How discovered: O
Nature of condition: M, J
Precautionary procedure: H

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

What was found

AIRCRAFT WAS GROUNDED: PILOT REPORTS ON PUSH BACK ELECTRIC 1 PUMP (B SYSTEM), OVERHEAT LIGHT ILLUMINATED. FAINT ODOR, POSSIBLE ELECTRIC DETECTED ODOR WENT AWAY WHEN PUMP WAS TURNED OFF, WHEN OVERHEAT LIGHT IS TESTED IT IS EQUAL BRIGHTNESS WITH THE ELECTRIC 2 LIGHT, WHEN PUMP (ELECTRIC) IS TURNED ON OVERHEAT LIGHT ILLUMINATES VERY BRIGHT. MAINTENANCE REMOVED AND REPLACED HYD B ELECTRIC PUMP 1 IAW AMM 29-11-21, ALSO REPLACED HYD PUMPS MODULE P5-8 IAW AMM 29-11-91. ALL OPS CHECK GOOD. (SEE SDR # AALA201908129025)