Service difficulty report · Terminal · Lear 60LEAR

Difficulty date
December 12, 2013
Submitted
December 14, 2013
Operation
General aviation
Filed by
L2QR166Y
Pratt and Whitney Engine Services Inc
Aircraft
N78FR
Make and model
Lear 60LEAR
Aircraft serial
190
Aircraft time
4,862 hours, 3,145 cycles
Engine
Pwa PW305A
Engine time
3,628 hours, 2,257 cycles
Part
Terminal
Part number
30B1642
Part serial
NA
Condition
Wrong Part
Location
N1 Speed Sensor
Part time
333 hours, 166 cycles
Component
N1 Speed Sensor · Pwc
Component part number
30B615004
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

DURING ENGINE DISASSEMBLY FOR HOT SECTION INSPECTION AND REMOVAL OF THE N1 SPEED SENSOR, 2 ELECTRICAL TERMINAL LUGS SEPARATED FROM THE WIRES ATTACHED TO THEM. TERMINAL LUGS WERE NOT ORIGINAL EQUIPMENT AND EASILY SEPARATED FROM WIRING. UPON FURTHER INSPECTION IT WAS NOTED THAT THE REPAIR FOR TERMINAL LUG REPLACEMENT WAS NOT FULLY COMPLIED WITH IAW MM, PN 3043640, SECTION 77-11-06, TASK 77-11-06-350-806, PARA 7 C (1) (D); FUSION-WELD THE TERMINAL TO THE CONDUCTOR. NO EVIDENCE OF FUSION-WELD ON THE TERMINAL LUGS. LOGBOOK CONTAINS NO DOCUMENTED EVENT OF THIS REPAIR. ON 29 JUNE 2012 THE N1 SPEED SENSOR WAS REPLACED. N1 SPEED SENSOR WILL BE REPLACED AT THIS HOT SECTION INSPECTION EVENT.