SDR ASAA2022021837502

Service difficulty report · Pressure Switch · Boeing 737890

Difficulty date: February 18, 2022
Submitted: February 23, 2022
Operation: Air carrier
Aircraft: N583AS
Make and model: Boeing 737890
Aircraft serial: 35681
Aircraft time: 50,819 hours, 14,828 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Pressure Switch
Part number: 21C1322
Condition: Faulty
Location: L Ldg Gear W/W
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

ETOPS MANAGER REQUESTS DUE TO RELIABILITY TO REPLACE CENTER TANK LH BOOST PUMP LOW PRESS SWITCH (S154) AND RELAY (R54). GROUNDED - YES. REMOVED AND REPLACED LEFT CENTER BOOST PUMP GFI RELAY R54 REF B737-800 AMM 28-22-18/401 AND B737-800 WDM 28-23-11 SHT.1. LEFT CENTER BOOST PUMP GFI OPERATIONAL TEST NORMAL. REF AMM 28-22-41-720-802. FUEL LEVELED IN WINGS FOR DISPATCH. 440 LBS REMAIN IN CENTER FUEL TANK. REMOVED AND REPLACED LEFT CENTER BOOST PUMP LOW PRESS SWITCH REF AMM 28-42-11. OPS CHECK GOOD NO LEAKS DETECTED.