Service difficulty report · Modulating Valve · Boeing 76733A

Difficulty date
July 23, 2021
Submitted
August 11, 2021
Operation
Air carrier
Aircraft
N378AX
Make and model
Boeing 76733A
Aircraft serial
28147
Aircraft time
89,334 hours, 13,861 cycles
Part
Modulating Valve
Part number
7738556
Part serial
200108093
Condition
Defective
Location
Rt Engine
Stage of operation
CL
How discovered
O
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

RT ENGINE BLEED OVERHEAT RT ENGINE BLEED OFF R1 PACK AFT EICAS OCCURED AT HIGH & LOW TRUST SETTING ~ R&R FAMV PER B767-300 FIM 36-10 FT 835 SHT 3 BLK 4+47 & AMM 36-11 P.CASAS 13013 R&R "R" ENG BLEED AIR CONT CARD PER FIM 36-10 FT 835 SHT 3 BLK 44 & AMM 36-11 P.CASAS 13013 R&R THE PRSOV PER AMM 36-11 & FIM 36-10 FT 835 SHT 3 BLK 3 D.F. 14232 PERFORMED ENGINE RUN IAW AMM 71-00 OPS CHECKED PRSOV & FAMV BOTH FOUND GOOD

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