Service difficulty report · Uplock · Amd FALCON2000

Difficulty date
August 26, 2012
Submitted
September 18, 2012
Operation
Air carrier
Aircraft
N269QS
Make and model
Amd FALCON2000
Aircraft serial
169
Aircraft time
8,955 hours, 5,569 cycles
Engine
Cfe CFE73811B
Part
Uplock
Part number
C242450061
Part serial
H1282
Condition
Failed
Location
Nlg
Part time
1,454 hours, 917 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

UPON GEAR RETRACTION, RECEIVED INDICATION THE GEAR DID NOT STOW. ALL 3 RED LIGHTS AND THE GEAR HANDLE FLASHES, FELT THERE WAS SOME MOVEMENT OF THE GEAR. EXTENDED GEAR IAW CHECKLIST AND EXTENSION SOUNDED QUICKER THAN NORMAL. DOWNLOADED CODES 301-335 ON BSCU 1 AND CODES 401-435 ON BSCU 2. ON INSPECTION OF GEAR, SEVERAL TIMES THE MAIN GEAR FOLLOW DOORS WOULD NOT COME UP AND LOCK, CHECKED POWER GOING TO PIN G ON 150GM AND PIN H SHOULD NOT HAVE POWER, PIN G AND H HAD 28 VOLTS, WENT TO CHECK POWER AT X1 ON 504GM AND NOTICED THAT THE NOSE GEAR HAD FALLEN OUT OF NOSE GEAR BAY WITH GEAR HANDLE IN THE UP POSITION AND MAINS WERE LOCKED IN PLACE, CHECKED RIG OF UPLOCK HOOKS AND COULD NOT GET IT TO LOCK IN THE UP AND LOCKED POSITION. R & R NLG UPLOCK BOX IAW AMM 32-22-17-900-801. PERFORMED GEAR SWINGS AND BLED UPLOCK ASSY IAW AMM 29-00-00-870-801. OPS CHECKED GOOD.