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SDR ASAA2013022694116

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Service difficulty report · Seal · Boeing 737890

FAA SDR system

Difficulty date
February 26, 2013
Submitted
March 11, 2013
Operation
Air carrier
Aircraft
N564AS
Make and model
Boeing 737890
Aircraft serial
35103
Aircraft time
24,338 hours, 7,560 cycles
Engine
Cfmint CFM567B26US
System (JASC)
7220 · Turbine Engine Air Inlet Section
Part
Seal
Part number
3400018160
Condition
Torn
Location
Nr 1 Engine
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

NR 1 ENGINE TREND DATA SHOWS A SUDDEN INCREASE IN LOW PRESSURE ROTOR VIBRATION LEVELS. DATA SCATTER INDICATES HARDWARE INSPECTION AND FAN LUBE REQUIRED. PERFORMED NR 1 ENG FAN BLADE LUBE IAW TC 78472002. DURING FAN BLADE INSPECTION FOUND PLATFORM SEAL POSITION 12, 20, 21 AND 23 TORN AND MISSING, REPLACED PLATFORM 12, 20, 21AND 23 IAW TC 78472002. PERFORMED ENG RUN TEST 7-VIBRATION SURVEY IAW AMM 71-00-00, PB 501 FOUND VIBRATION WITHIN LIMITS.