SDR 752006

Service difficulty report · Regulator Valve · Boeing 747228F

Difficulty date
March 15, 2007
Submitted
March 21, 2007
Operation
Air carrier
Aircraft
N752SA
Make and model
Boeing 747228F
Aircraft serial
21255
Aircraft time
122,096 hours, 23,628 cycles
Engine
Ge CF650E2
Engine time
72,864 hours, 13,278 cycles
Part
Regulator Valve
Part number
8988061
Part serial
P188
Condition
Leaking
Location
Nr 1 Engine
Stage of operation
CL
How discovered
O
Nature of condition
M, J
Precautionary procedure
O

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

What was found

NR 1 ENGINE MAXIMUM TAKEOFF POWER. PILOT'S PANEL ENGINE LOOP FAULT LIGHT ILLUMINATED INTERMITTENTLY FOLLOWED BY INTERMITTENT FIRE WARNING. NACELLE TEMPERATURE FLUCTUATED 5 TO FULL SCALE. SET CLIMB POWER. NACELLE TEMPERATURE A & B SETTLED TO 2.0. TAKEOFF POWER 111.2 AT 14 DEGREES C. 2997, EGT 913 DEGREES C CONTINUED TO PANC. FOUND PRSOV AT FAULT. REMOVED AND REPLACED PRSOV IN ACCORDANCE WITH AMM 36-11-19. LEAK CHECK GOOD IN ACCORDANCE WITH AMM 71-00-00. OPERATIONAL CHECK GOOD IN ACCORDANCE WITH AMM 36-11-00.