Service difficulty report · Heater · Boeing 777222

Difficulty date
July 1, 2025
Submitted
July 4, 2025
Operation
Air carrier
Aircraft
N777UA
Make and model
Boeing 777222
Aircraft serial
26916
Aircraft time
109,416 hours, 20,100 cycles
Engine
Pwa PW4077
Part
Heater
Condition
Malfunctioned
Location
Zone 400
Stage of operation
CR
How discovered
V
Nature of condition
J
Precautionary procedure
A

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

What was found

CREW REPORTS LT ENG EGT EXCEEDED DURI NG CLIMB. AHM SHOW ENG L EGT RED MM MSG 77-62121, EGT PEAK 626.5 DEG "TOL" TIME OVER LIMIT 05SEC. REF AMM 31-61-00-800-804 (20 1), NOTE DOWN EGT PEAK & DURATION FROM LEFT ENG EXCD. LT ENGINE EXCEEDANCE TIME OVER LIMIT OF 6.6 SECONDS AT 626.5 CELCIUS. WITHIN AREA "A" OF FIGURE 603 REF AMM TASK 72-00-00-290-818-N01. ENGINE OVERTEMPERATURE INSPECTION REQ'D. PHOTO ADDED. ACCP BORO INSPECTION OF #1 ENG, ESN 777110 IAW ASSIGNED TASK CARDS 26-0572-8-0005, 26-0572-8-0019, 26-0572-8-0020, 26-0572-8-0076, NO LIMITING DEFECTS FOUND. INFORMATION UPDATED ON LOG PAGE 5409234 FOR REPLACEMENT OF #1 ENG OIL FILTER, FUEL FILTER, CHIP DET INSP, SERVO FUEL HEATER FILTER, 4.95 INSP LEAK CHK. BORO INSP HAS BEEN UPDATED, NEED EGT OVERTEMP INSP FINDINGS UPDATED FROM PRIOR SHIFT. ACP'D TEST NO. 3A - IDLE POWER TEST (COWL OPEN) (OPTIONAL TO TEST 3) REFERENCE: TASK 71-00-00-790-805-N00. ALL PARAMETERS WITHIN LIMITS REF ENGINE OPERATION LIMITS REFERENCE: TASK 71-00-00-860-802-N00. LEAK CHECK GOOD ON ALL COMPONENTS RPL'D. DPI FUEL SERVO HEATER FILTER "NOT EXTENDED". REF TEST #6 AMM 71-00-00-730-801-N00