SDR ASAA2020051332723

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: May 12, 2020
Submitted: May 13, 2020
Operation: Air carrier
Aircraft: N472AS
Make and model: Boeing 737990ER
Aircraft serial: 60580
Aircraft time: 20,142 hours, 6,352 cycles
System (JASC): 2820 · Aircraft Fuel Distribution System
Part: Unknown
Condition: Leaking
Location: Fuel System
Stage of operation: IN
How discovered: O
Nature of condition: K
Precautionary procedure: K

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

What was found

#1 ENGINE HAS FUEL LEAKING FROM LOWER COWL DRAIN. GROUNDED - YES. RAN #1 ENGINE AT IDLE ACCOMPLISHED INSPECTION OF ENGINE VENTS AND DRAINS REF B737-900 AMM 71-71-00-200-801-F00 NO LEAKAGE NOTED DURING ENGINE RUN OR AFTER ENGINE SHUTDOWN. SUSPECT #1 ENG SPAR VALVE C/B WAS RESET WITH NO POWER TO AIRCRAFT REF T/C N8010001 CAUSING LEAKAGE. #1 ENG SPAR VALVE OPS CHECKS NORMAL REF B737-900 M/M 28-22-11-400-804.