SDR CALA2024030100614

Service difficulty report · Oil System · Boeing 777222

Difficulty date: February 27, 2024
Submitted: March 1, 2024
Operation: Air carrier
Aircraft: N788UA
Make and model: Boeing 777222
Aircraft serial: 26942
Aircraft time: 107,090 hours, 14,192 cycles
Engine: Pwa PW4090
Engine time: 85,857 hours, 11,521 cycles
System (JASC): 7261 · Turbine Engine Oil System
Part: Oil System
Condition: Leaking
Location: Nr 1 Engine
Stage of operation: CL
How discovered: O
Nature of condition: K, J
Precautionary procedure: B, E, A

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

What was found

#1 ENGINE OIL QTY WENT TO 0 AFTER FLAP CLEANUP FOLLOWED BY DECREASING OIL PRESSURE. ENG WAS SHUTDOWN PER CHECKLIST WITH OIL PRESSURE AT 90PSI AND DECREASING. ENGINE WINDMILL FOR APPROX 45 MINUTES AFTER SECURING IT. FUEL SERVO HEAT EXCHANGER SUPPLY LINE 2EA BOLTS BROKEN. SHOULD READ FUEL HEATER SERVO. REPLACED #1 ENGINE PER MM 71-00-02-400-807-N01. OPS CK NORMAL ROTABLE PARTS CHANGE WAS INDICATED - TT # 1451247 SN OFF 2067 ENGINE, (PW4090 OFF 27-7200-9-0001 2067 ON 27-7200-9-0001 2107