ASN Wikibase Occurrence # 190039
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| Date: | Wednesday 14 September 2016 |
| Time: | 14:16 LT |
| Type: |  Fokker 100 |
| Owner/operator: | Iran Air |
| Registration: | EP-CFP |
| MSN: | 11409 |
| Year of manufacture: | 1992 |
| Fatalities: | Fatalities: 0 / Occupants: 115 |
| Aircraft damage: | Substantial |
| Category: | Serious incident |
| Location: | Tehran-Mehrabad Airport (THR/OIII) -
 Iran
|
| Phase: | Taxi |
| Nature: | Passenger - Scheduled |
| Departure airport: | Tehran-Mehrabad Airport (THR/OIII) |
| Birjand Airport (XBJ/OIMB) | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
Iran Air flight IR212, a Fokker 100, suffered a collapse of the nose landing gear at Tehran-Mehrabad Airport. The incident happened on the eastern platform.
The nose gear collapsed rearward and sideways, causing the wheels to become partially embedded in the fuselage below the R1 door.
3.2 Causes:
3.2.1 Main Causes:
The event initiated by fatigue cracking in the main fitting of Nose landing gear.
The lower section of the main fitting showed multiple crack initiation points on the fracture surface; the fractured upper spigot section of the turning tube was visible inside the main fitting. The analyses shown there were cracks in the NLG main fitting and the turning tube which propagated at the same time but independently of one another.
Prior to the initiation of MF fatigue cracks: an operation or events outside of the certification envelope of the MF must have occurred for a fatigue crack to initiate at this section.
Regarding the Turning Tube; a malformed radius originating from a repair of the turning tube led to a double radius feature, locally increasing the stress which resulted in fatigue crack initiation.
The most probable sequence of events is that the main fitting fractured first, causing the collapse of the leg. Base on SAFRAN Landing Systems report TE-GL-00159023 the fracture of main fitting (fatigue crack initiation) was occurred during the life of the component.
3.2.2 Contributory Factors:
Lack of preventative inspection task as Single visual inspection of AMM for rough towing to detect failure is found.
Maintenance process of nose landing gear was not effective to prevent incident.
Sources:
https://www.cao.ir/web/english/investigation-reports?p_p_id=NetFormGetFile_WAR_NetForm&p_p_lifecycle=2&p_p_resource_id=getFile&_NetFormGetFile_WAR_NetForm_file=ZTliajVaZmlpbWZNZGE3OTc5TGNMNTVCQXZKSzl2RGtZVlBDNnVFV0d2enM4R1QreFRaYWZrNkNjNDczeDZnQStXOHRFcjlGVDdhYQppemRldWVxUytRPT0=.pdf
History of this aircraft
Other occurrences involving this aircraft
| 8 August 2006 | PT-MQN | TAM Linhas Aéreas | 0 | São Paulo, SP |  |
min |
Images:
Media:
Iran Air F100 EP-CFP flight IR212, broke the nosewheel at Mehrabad few hours ago. Planned destination Birjand. #Iran pic.twitter.com/IxNBYrlFlK
— Aviation Iran (@aviationirancom) September 14, 2016
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-Sep-2016 12:42 | harro | Added |
| 14-Sep-2016 12:47 | harro | Updated [Time, Embed code, Narrative] |
| 14-Sep-2016 16:01 | Anon. | Updated [Phase, Damage, Photo, ] |
| 02-Jun-2017 17:05 | harro | Updated [Location] |
| 25-May-2020 17:50 | KagurazakaHanayo | Updated [Time, Total occupants, Destination airport, Source, Narrative] |
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