Service difficulty report · Fitting · Aerosp ATR42300

Difficulty date
January 22, 2009
Submitted
March 5, 2009
Operation
General aviation
Make and model
Aerosp ATR42300
Aircraft time
29,323 hours
Engine
Pwa PW120
Propeller
Hamstd 14SF5
Part
Fitting
Part number
ER804D060604
Condition
Overtorqued
Component
Mlg Selector Va · Aerosp · 1005383Y00
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

ON TWO SEPARATE OCCASIONS WHILE PERFORMING UNSCHEDULED MAINTENANCE INVOLVING THE MLG SELECTOR VALVE , TWO ALUMINUM HYDRAULIC FITTINGS HAVE BEEN FOUND DAMAGED OR CRACKED (1) OCT 27, 2008 - WHILE TROUBLESHOOTING A REPORTED HYDRAULIC LEAK UNION P/N MS21902D6 HAD A DAMAGED FLARE. (2) JAN 9, 2009, WHILE REPLACING THE MLG SELECTOR VALVE REDUCER P/N ER804D060604 WAS FOUND CRACKED. SUSPECT THAT THESE FITTING HAVE BEEN OVER TORQUED CAUSING DAMAGE AND STRESS CRACKS.

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