Service difficulty report · Valve · Boeing 737890

Difficulty date
February 10, 2012
Submitted
February 13, 2012
Operation
Air carrier
Aircraft
N535AS
Make and model
Boeing 737890
Aircraft serial
35200
Aircraft time
3,970 hours, 1,183 cycles
Part
Valve
Part number
32895626
Part serial
13406
Condition
Faulty
Location
Bleed Air Sys
Part time
3,970 hours, 1,183 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

DURING CLIMBOUT PASSING 35 000 THE RIGHT BLEED TRIP ANNUCIATOR ILLUMINATED RIGHT DUCT PRESSURE WAS ZERO. COMPLIED WITH QRH PROCEDURE BLEED TRIPPED AGAIN. NO DUCT PRESSURE SPLITS NOTED PRIOR TO TRIP OFF. ACCOMP PCV HEALTH CHECK MM 36 12 00 700 801 NR 2 ENG PCV FAILS STEP G(5). ACCOMP ENGINE BLEED AIR SYSTEM HEALTH CHECK MM 36 11 00 700 801 NR 2 ENG PRSOV FAILS STEP G(6)(A) PASSES STEP G(6)(M). HSV FAILS STEP H(5)(A) PASSES H(5)(A)(3)(C).80023. REPLACED PRSOV MM 36 11 04 HSV MM 36 11 06 PCV MM36 12 02. ACCOMP ENG BLEED CROSSOVER OPS TEST PER MM 36 11 00 710 801. ALL PARAMETERS/VAUES NORMAL TEST GOOD. NO BLEED TRIP OR SPLIT NOTED.