20001213040829A

Accident · Substantial damage

FAA accident report · Cessna 421B · Pensacola, FL · December 13, 2000

Date
December 13, 2000 · 22:27 local
Place
Pensacola, FL
Airport
Pensacola Regional Airport
Phase of flight
Roll-Out (Fixed Wing)
Operating rules
Air taxi and commuter (Part 135)
Operator
YLAA
Damage
Substantial damage
Aircraft
N781SL
NTSB investigation
NTSBMIA01LA040
Reported as
Cessna 421B
Reported engine
Continental GTSIO520H
People aboard
4
Fatal injuries
0
Pilot’s flight hours
7,127 total94 in this make and model128 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) Pilot stated after departure from Pensacola Regional Airport the landing gear would not retract. After landing at Pensacola Regional Airport the aircraft swerved to the left. Flight crew attempted to correct with differential power, right full rudder and right brake. Unable to maintain directional control, the aircraft exited the runway to the left, struck a runway light with the left main gear. The left main gear separated from the aircraft. (.4) after takeoff the landing gear would not retract and the landing gear warning horn sounded. The pilot continued to the destination airport and when weather prevented a landing, he returned to the departure airport. After landing the aircraft swerved to the left and the left main gear tire could be heard squealing. The aircraft went off the side of the runway and the left main gear collapsed and separated. Post crash examination of the aircraft showed the washer, which retains the bolt in the left main gear scissors, had failed and the scissors had separated. This allowed the gear to turn and prevented the gear from retracting due to the ground switch on the scis sors not being able to open during takeoff. The failed washer was the subject of Cessna aircraft company, service information letter ME83-37, dated November 23, 1983. This letter called for replacement of this washer with a thicker washer at the next routine 100-hour inspection.

As the FAA filed it

(-23) PILOT STATED AFTER DEPARTURE FROM PENSACOLA REGIONAL AIRPORT THE LANDING GEAR WOULD NOT RETRACT. AFTER LANDING AT PENSACOLA REGIONAL AIRPORT THE AIRCRAFT SWERVED TO THE LEFT. FLIGHT CREW ATTEMPTED TO CORRECT WITH DIFFERENTIAL POWER, RIGHT FULL RUDDER AND RIGHT BRAKE. UNABLE TO MAINTAIN DIRECTIONAL CONTROL, THE AIRCRAFT EXITED THE RUNWAY TO THE LEFT, STRUCK A RUNWAY LIGHT WITH THE LEFT MAIN GEAR. THE LEFT MAIN GEAR SEPARATED FROM THE AIRCRAFT. (.4) AFTER TAKEOFF THE LANDING GEAR WOULD NOT RETRACT AND THE LANDING GEAR WARNING HORN SOUNDED. THE PILOT CONTINUED TO THE DESTINATION AIRPORT AND WHEN WEATHER PREVENTED A LANDING, HE RETURNED TO THE DEPARTURE AIRPORT. AFTER LANDING THE AIRCRAFT SWERVED TO THE LEFT AND THE LEFT MAIN GEAR TIRE COULD BE HEARD SQUEALING. THE AIRCRAFT WENT OFF THE SIDE OF THE RUNWAY AND THE LEFT MAIN GEAR COLLAPSED AND SEPARATED. POST CRASH EXAMINATION OF THE AIRCRAFT SHOWED THE WASHER, WHICH RETAINS THE BOLT IN THE LEFT MAIN GEAR SCISSORS, HAD FAILED AND THE SCISSORS HAD SEPARATED. THIS ALLOWED THE GEAR TO TURN AND PREVENTED THE GEAR FROM RETRACTING DUE TO THE GROUND SWITCH ON THE SCIS SORS NOT BEING ABLE TO OPEN DURING TAKEOFF. THE FAILED WASHER WAS THE SUBJECT OF CESSNA AIRCRAFT COMPANY, SERVICE INFORMATION LETTER ME83-37, DATED NOVEMBER 23, 1983. THIS LETTER CALLED FOR REPLACEMENT OF THIS WASHER WITH A THICKER WASHER AT THE NEXT ROUTINE 100-HOUR INSPECTION.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.