SDR CA000706026

Service difficulty report · Housing · Aerosp AS355F1

Difficulty date: June 18, 2000
Submitted: January 19, 2001
Operation: General aviation
Make and model: Aerosp AS355F1
Aircraft time: 4,395 hours
Engine: Allsn 250C20F
System (JASC): 6420 · Tail Rotor Head
Part: Housing
Part number: 350A33211905
Condition: Sheared
Location: T/R Drive Shaft
Part time: 898 hours
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

(CAN) DURING HUB REMOVAL TO C/W SB 65.00.38 (T/R SPYDER BEARING KIT INSTALLATION) THE KEY THAT ALIGNS HUB TO T/R SHAFT WAS FOUND SHEARED & THE HUB HAD SPUN APPROX. 110 DEGREES. THE T/R LONG DRIVE SHAFT P/N 350A34-0110-07 WAS FOUND TO HAVE AN APPROX 60 DEGREES TWIST IN IT. FOLLOWING PARTS WERE REPLACED DUE TO SUSPECT T/R STRIKE. LONG DRIVE SHAFT, T/R HUB, T/R GEAR BOX, T/R HUB BOLT, T/R BLADES, T/R COUPLE MGBOLTS, EXPANDABLE PIN, SPLIT BUSHINGS, T/R PITCH LINKS.

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