Service difficulty report · Sensor · Boeing 7374B7

Difficulty date
May 4, 2014
Submitted
May 6, 2014
Operation
Air carrier
Aircraft
N449US
Make and model
Boeing 7374B7
Aircraft serial
24893
Aircraft time
62,229 hours, 41,225 cycles
Engine
Cfmint CFM563B2
Part
Sensor
Part number
8901274
Part serial
WYG48757
Condition
Faulty
Location
Nr 1 Engine
Part time
61,285 hours, 41,388 cycles
Stage of operation
DE
How discovered
O
Nature of condition
R
Precautionary procedure
O

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

What was found

ON DESCENT OUT OF 26,000 FT, WITH N1 AT 76%, SMALL COMPRESSOR STALLS ON LT ENG. ENG GAUGES FLUCTUATED ON LT ENG N1 & N2, EGT NORMAL. PULLED ENG TO IDLE, ALL INDICATIONS NORMAL. LEVEL OFF AT 10,000 FEET, PUSHED BOTH ENGS UP AT 75%, ENG COMPRESSOR STALLED, PULLED TO IDLE, NORMAL INDICATION AT IDLE. LANDED WITH ENG AT IDLE. ACCOMPLISHED BORESCOPE FOR STALL, SURGE, ON NR 1 ENG IAW AMM 72-00-00-216-062-C00, ITEM N 3, PAGE 14. NO DAMAGE FOUND. ACCOMPLISHED ENG NR 1 TROUBLESHOOTING IAW AMM 71-00-43-101, BLOCK 1 THRU BLOCK 11. R & R ENG NR 1 CIT SENSOR IAW AMM 73-21-02-404-010. ACCOMPLISHED POWER ASSURANCE CHECK IAW AMM 71-00-00-725. NO COMPRESSOR STALLS NOTED.

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