20070220006149A

Accident · Substantial damage

FAA accident report · Cessna 402C · Cordova, AK · February 20, 2007

Date: February 20, 2007 · 19:25 local
Place: Cordova, AK
Airport: Merle K (Mudhole) Smith Airport
Phase of flight: Level Off Touchdown
Operating rules: Air taxi and commuter (Part 135)
Operator: ACSA
Damage: Substantial damage
Aircraft: N402ET
NTSB investigation: NTSBANC07LA021
Reported as: Cessna 402C
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 19,000 total50 in this make and model24 in the last 90 days

N402ETRegistration cancelled Nov 27, 2012 · Cessna 402CS/N 402C0054 · Built 1979 Airframe modelCessna 402C Engine modelContinental TSIO-520 seriesReciprocating

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) Upon landing the right landing gear torque link separated due to the hardware build up not being assembled correctly utilizing a large area washer before the nut, causing the landing gear to rotate 90 degrees or more allowing the side load on the gear to cause the gear to extend aft of the wing. The right wing, wing tip, flap and aileron were damaged. This is a maintenance issue. The maintenance manual does not address the hardware build up on the torque link assembly. However Cessna service information letter number ME83-37 dated 11/23/1983 does specify the necessary hardware build up especially the large diameter washers used. Standard maintenance practices were not used and Cessna (sil #ME83-37) is not incorporated in the maintenance manual.

As the FAA filed it

(-23) UPON LANDING THE RIGHT LANDING GEAR TORQUE LINK SEPARATED DUE TO THE HARDWARE BUILD UP NOT BEING ASSEMBLED CORRECTLY UTILIZING A LARGE AREA WASHER BEFORE THE NUT, CAUSING THE LANDING GEAR TO ROTATE 90 DEGREES OR MORE ALLOWING THE SIDE LOAD ON THE GEAR TO CAUSE THE GEAR TO EXTEND AFT OF THE WING. THE RIGHT WING, WING TIP, FLAP AND AILERON WERE DAMAGED. THIS IS A MAINTENANCE ISSUE. THE MAINTENANCE MANUAL DOES NOT ADDRESS THE HARDWARE BUILD UP ON THE TORQUE LINK ASSEMBLY. HOWEVER CESSNA SERVICE INFORMATION LETTER NUMBER ME83-37 DATED 11/23/1983 DOES SPECIFY THE NECESSARY HARDWARE BUILD UP ESPECIALLY THE LARGE DIAMETER WASHERS USED. STANDARD MAINTENANCE PRACTICES WERE NOT USED AND CESSNA (SIL #ME83-37) IS NOT INCORPORATED IN THE MAINTENANCE MANUAL.

NTSB investigation

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

NTSB ANC07LA021Accident · No injuriesLimited investigationFinal reportCordova, AKThe failure of the right main landing gear linkage during the landing roll, which resulted in a loss of directional control and the collapse of the right main landing gear. A factor associated with the accident was the failure of company maintenance personnel…Feb 20, 2007 · Substantial damage

Other reports on N402ET · 5

Matched to the same aircraft by N-number and date.

Accident 20031113028199ALevel Off Touchdown · Galena, AK(-23) Gear unsafe light. Attempted normal and emergency procedures including blow down without success. Low on fuel and daylight, landed rwy 25, settled on right wing. Extent of damage unknown. NTSB contact erickson. [privacy data omitted]Nov 13, 2003 · Minor damage Accident 20000522021359AFinal Approach · Cordova, AK(.4)The airline transport certificated pilot was landing at the conclusion of a cargo flight. The visibility was about 2 miles in light rain and mist. When the airplane was about 50 feet above the ground at 100 knots, the pilot saw three Canada geese fly up…May 22, 2000 · Substantial damage Incident 20000426018609IGround Taxi, Other Airplane · Anchorage, AK(-23)On April 26, 2000 at approximately 6AM, as the pilot was REPOSITIONINGN402ET from where it was parked on float plane drive to delta air cargo via float plane drive thru lake Hood strip taxiway. As he turned into the taxiway he struck the right wing tip…Apr 26, 2000 · Minor damage Incident 19990202008749IGround Taxi, Other Airplane · Fairbanks, AK(-5) After executing the ILS to IL at fai, pilot attempted to exit the runway at intersection mike, per atc's request. As pilot taxied to mike, the weather deteriorated & he encountered dense ice fog. Believing that he was taxiing between the blue taxiway…Feb 2, 1999 Incident 19980320007529IFinal Approach · Fairbanks, AKNarrative: pilot was being line checked from Fairbanks, AK to rampart, Alaska. On approach into rampart, pilot selected approach flaps and gear down without difficulty when he attempted to increase the flaps he heard a loud pop and the aircraft started to…Mar 20, 1998