Service difficulty report · Regulator · Boeing 757222

Difficulty date
July 22, 2010
Submitted
July 23, 2010
Operation
Air carrier
Aircraft
N596UA
Make and model
Boeing 757222
Aircraft serial
28749
Aircraft time
49,038 hours, 13,669 cycles
Engine
Pwa PW2037
Part
Regulator
Part number
S212N1023
Part serial
58
Condition
Malfunctioned
Location
Bleed Air Sys
Stage of operation
CR
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

LT PACK & ENG BLEED ISSUES, RTFL. LT PACK WOULD NOT OPERATE NORMALLY AND CREW NOTICED LT ENG BLEED WOULD COME ON. WHILE ACCOMPLISHING PNEUMATIC HEALTH CHECK, FOUND PRSOV REGULATOR BAD, REPLACED PRSOV REGULATOR.