ASN Wikibase Occurrence # 59712
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| Date: | Monday 27 April 2009 |
| Time: | 06:00 LT |
| Type: |  Cessna 402C |
| Owner/operator: | Hyannis Air Services |
| Registration: | N769EA |
| MSN: | 402C0303 |
| Year of manufacture: | 1980 |
| Total airframe hrs: | 24161 hours |
| Engine model: | Continental TSIO-520-VD |
| Fatalities: | Fatalities: 0 / Occupants: 9 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Nantucket Memorial Airport, Nantucket, Massachusetts -
 United States of America
|
| Phase: | Landing |
| Nature: | Passenger - Scheduled |
| Departure airport: | Hyannis-Barnstable Airport, MA (HYA/KHYA) |
| Nantucket Memorial Airport, MA (ACK/KACK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot lowered the landing gear and the left main landing gear would not extend. He recycled the landing gear and completed the checklist items with negative results. The left landing gear subsequently collapsed during the landing roll out. A landing gear retraction test was conducted and the failure was duplicated. The extend inlet port for the up lock actuator was then removed for inspection. A small ball bearing was in the wrong position with respect to the larger ball bearing. The smaller ball bearing jumped the larger ball bearing causing a blockage. The up lock actuator and the main gear actuator were removed and examined at an authorized repair facility. Disassembly of the up lock actuator confirmed the initial finding, and revealed that the smaller ball bearing was too small. The main gear actuator was tested and was within manual limits. The operator stated that the up lock actuators are a condition item. The mechanic who performed the last inspection stated that he did not replace any bearings. The investigation could not determine who replaced the bearings or when they were replaced.
Probable Cause: Installation of an improper bearing in the landing gear actuator.
Accident investigation:
 |
|
Sources:
NTSB ERA09IA267
History of this aircraft
Other occurrences involving this aircraft
| 31 August 2012 | N769EA | Cape Air | 0 | Nantucket Memorial Airport - KACK, Nantucket, MA | |
min |
| Gear collapse | ||||||
| 30 March 2021 | N769EA | Hyannis Air Service Inc dba. Cape Air | 0 | Christiansted, Saint Croix |  |
min |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Apr-2009 23:23 | slowkid | Added |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
Corrections or additions? ... Edit this accident description
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