Service difficulty report · Nut · Hughes 500N

Difficulty date
September 18, 2000
Submitted
October 17, 2000
Operation
General aviation
Aircraft
N520PM
Make and model
Hughes 500N
Aircraft serial
LN059
Part
Nut
Part number
369H7024
Condition
Loose
Location
Unilock
Part time
24 hours
Component
Unilock · Hughes
Component part number
369A7010501
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

AT ACTT: 23.5 HOURS, THE UNILOCK, PN 369A7010501 SN 024598-5326, WAS INSTALLED IN NEW CONDITION TO REPLACE A LEAKING UNILOCK. AFTER 23.6 HRS OF OPERATION, PILOT RETURNED STATING THE CYCLIC CONTROL HAD PLAY LONGITUDINALLY. THE GRIP WOULD MOVE SEVERAL INCHES BEFORE THE INPUT WOULD BE SENT TO THE ROTOR SYSTEM. FOUND NUT, PN 269H7024, WAS LOOSE ALLOWING THE INPUT ROD END TO MOVE. IF THE NUT COMPLETELY LOOSENED, THE ROD END MAY SEPARATE FROM THE UNILOCK LEAVING PILOT WITH NO LONGITUDINAL CONTROL. (X)