Service difficulty report · Manifold · Boeing 747481F

Difficulty date
October 7, 2025
Submitted
October 16, 2025
Operation
Air carrier
Aircraft
N767CK
Make and model
Boeing 747481F
Aircraft serial
34017
Aircraft time
71,533 hours, 13,216 cycles
Engine
Ge CF680C2B1F
Engine time
83,899 hours, 12,461 cycles
Part
Manifold
Condition
Cracked
Location
Nr 3 Eng
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
B, A

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

What was found

NR 3 ENG FAILED, STABLE/NO VIBRATIONS, N1-26.9, OIL PSI 9 PSI 1 MIN THEN ABOVE 10 PSI. N2-26.2, TIME OF FAIL 2243 IN THE CLIMB. IAW FIM 73-00 FIG 114 FAULT TREE PERFD ENG FUEL SUCTION FEED OPS TEST IAW AMM 28-22-00. OPS CHK FAILED. NO FUEL FLOW IND ON START UP. ENG FAILED TO LIGHT. NO OPS PARAMETERS EXCEEDED, 1 ATTEMPT RESTART ZERO FUEL PSI, NO SHUTDOWN VIA FIRE HANDLE. GRND CREW REPORT FUEL LEAKING FROM K-DRAINS. NO FUEL MIST FROM EXHAUST. R & R NR 3 ENG FUEL PUMP IAW AMM 73-11-01. NO FIX. ENG ANTI-ICE NORM CONTINUOUS IGNITION, RELATED GEN STALL, 1 RESTART ATTEMPT. R & R NR 3 ENG HMU IAW AMM 73-21-14. NO FIX. FOUND NR 3 ENG FUEL MANIFOLD CRACKED AT 11 O`CLOCK. WO 767017878 FOR REMOVAL & REPLACEMENT OF NR 3 ENG, WO 767017878 NR 3 ENG REQUIRES REPLACEMENT. R & R NR 3 ENG IAW AMM 71-00-02. ALL CHKD GOOD. ORIG SUB DATE: 10/15/2025.