SDR UALA2010062802274

Service difficulty report · Shaft · Boeing 747422

Difficulty date: June 25, 2010
Submitted: June 28, 2010
Operation: Air carrier
Aircraft: N199UA
Make and model: Boeing 747422
Aircraft serial: 28717
Aircraft time: 52,094 hours, 6,212 cycles
Engine: Pwa PW4056
Engine time: 65,034 hours, 7,725 cycles
System (JASC): 7200 · Engine (Turbine/Turboprop)
Part: Shaft
Condition: Sheared
Location: Nr 2 Engine
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: C

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

What was found

AIRPLANE ABORTED T-OFF AT APPROX 50 KNOTS DUE ENG 2 WILL NOT GO ABOVE 105 EPR. HIGH ENERGY STOP INSP IS REQUIRED. HIGH ENERGY STOP INSP CARRIED OUT IAW MM, ALL TIRES & BRAKES CONDITION CHECK NORMAL. UPON VSV CONTROL SYS INSP MAINT REPORTED THAT NR 2 ENG INLET GUIDE VANE UNISION RING "ADJUSTER LINK" TO SVA BELLCRANK HAS NUT SLEEVE ASSY SHEARED (IPC 72-35-00-025 PG 1, ITEM 40) CAUSING IGV ADJUSTER LINK DETACHMENT FROM VSV BELLCRANK CLEVIS. REPLACED NR2 ENG IAW TOD 71-00-02.