Service difficulty report · Actuator · Boeing 757222

Difficulty date
April 2, 2012
Submitted
July 3, 2012
Operation
Air carrier
Aircraft
N550UA
Make and model
Boeing 757222
Aircraft serial
25398
Aircraft time
76,711 hours, 22,266 cycles
Engine
Pwa PW2037
Part
Actuator
Part number
3830041109
Part serial
266
Condition
Faulty
Location
Engine
Stage of operation
NR
How discovered
9
Nature of condition
J
Precautionary procedure
O

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

What was found

BLEED TRACK CHECK MESSAGE WITH ASSOCIATED STATUS MESSAGES 276-22 & 276-26. CURRENTLY 2.5 BLEED SEEMS TO BE WORKING OK, JUST MESSAGES. WITHIN 50 FLT HRS, COMPLISHED TROUBLESHOOTING PER MM 71. ACCOMPLISHED NR 1 ENGINE FAULT ISOLATION FOR EPCS MESSAGES 2.5 BLEED-EEC, SVA FB, 351-25, 276- 22, AND 276-26 PER 71. NO DEFECT FOUND ON WIRING FROM EEC TO SVA AND 2.5 BLEED ACTUATOR. RESISTANCE CHECK OF SVA AND 2.5 ACT CHECKED GOOD PER 71-EPCS MSG INDEX PG 178 AND PG 180, FIG 115. ACCOMPLISHED CHECK OF 2.5 BLEED ACTUATOR LINKAGE PER MM. CHECKED GOOD. REPLACED 2.5 BLEED ACTUATOR PER MM AND ADJUSTED PER MM.