Jet Airways B738 at Khajuraho on Apr 13th 2015, gear collapse on landing
Last Update: February 5, 2018 / 17:41:58 GMT/Zulu time
Incident Facts
Date of incident
Apr 13, 2015
Classification
Accident
Airline
Jet Airways
Flight number
9W-2423
Departure
Varanasi, India
Destination
Khajuraho, India
Aircraft Registration
VT-JGA
Aircraft Type
Boeing 737-800
ICAO Type Designator
B738
Khajuraho Airport is estimated to remain closed for 48 hours (no NOTAM available so far).
Ground observers reported a hydraulic leak, a blown tyre and the collapse of the left main gear (sequence unclear).
The airline confirmed a technical problem with the landing gear after landing of flight 9W-2423 at Khajuraho, the passengers evacuated safely via slides.
India's DGCA have opened an investigation into the accident.
No weather (neither Metars nor local weather station) data are available.
On Feb 2nd 2018 India's DGCA released their final report concluding the probable causes of the accident were:
The LH Aft landing Gear trunnion pin failed due to overload following fatigue growth. Crack initiation was in the heat affected area where excessive grinding was done at the time of overhaul. Initial crack growth is charterized by intergranular cracking (assisted by hydrogen embrittlement mechanism) until fatigue took over.
The DGCA wrote: "At touchdown aircraft pitch was 4.39 ¢X, vertical G 1.65 and touchdown speed was 120 kts (Vref ƒ{ 4kts). During landing Roll 15 seconds after touchdown at speed 36 knots left main landing gear aft trunnion pin broke and aircraft started deviating to the left of center line. The aircraft came to stop on runway with damage to the LH landing gear and resting on LH engine, Nose & RH landing Gear."
The DGCA reported that the NTSB conducted the examination and laboratory testing of the failed trunnion.
The landing gear had been overhauled in Oslo (Norway), the later failed trunnion was overhauled there on March 27th 2012. The overhaul facility has been approved by Danish Transport Authority, however, had not been approved by India's DGCA.
The DGCA analysed:
The LH landing Gear Trunnion Pin Sl. No. E2410 and RH landing Gear Trunnion Pin Sl. No. E2338 was overhauled on 27th March 2012 and issued with EASA Form -1. M/s ST Aerospace Solutions (Europe) A/S, Oslo was approved by FAA and EASA but not approved by DGCA , India under CAR -145.The overhaul process sheets of Trunnion Pin were send to NTSB and it was found that the appropriate procedures as outlined for the landing gear overhaul were carried out. Both the left and right pins were apparently processed at the same time. As per Jet Airways Quality Department Manual Chapter 2 credentials of the proposed vendor was evaluated through a desktop audit of documents supplied. However, the manual doesn¡¦t restrict to Jet Airways to carryout work at DGCA CAR-145 approved organization.
After the accident, the failure investigation of Trunnion Pin were carried out at DGCA & NTSB, USA. The report reveals that that the ¡§the LH trunnion pin has failed in fatigue originating from black strip which is probably a pre-existed crack¡¨. ¡§Chicken wire¡¨ cracking was observed over the entire chrome surface of the pin. The fractured aft trunnion pin contained an intergranular crack on the fracture face measuring 0.018 inch from the outer diameter (OD). Fatigue cracking was observed emanating 0.22 inch from the intergranular crack. Fracture initiation occurred by heat induced cracking which propagated during processing by a hydrogen embrittlement mechanism. Once in service, fatigue cracking initiated off of the existing crack until final fracture by ductile separation.
Incident Facts
Date of incident
Apr 13, 2015
Classification
Accident
Airline
Jet Airways
Flight number
9W-2423
Departure
Varanasi, India
Destination
Khajuraho, India
Aircraft Registration
VT-JGA
Aircraft Type
Boeing 737-800
ICAO Type Designator
B738
This article is published under license from Avherald.com. © of text by Avherald.com.
Article source
You can read 2 more free articles without a subscription.
Subscribe now and continue reading without any limits!
Read unlimited articles and receive our daily update briefing. Gain better insights into what is happening in commercial aviation safety.
Send tip
Support AeroInside by sending a small tip amount.
Related articles
Jet Airways B773 at Amsterdam on Apr 21st 2017, tailstrike on departure
A Jet Airways Boeing 777-300, registration VT-JEW performing flight 9W-234 from Amsterdam (Netherlands) to Toronto,ON (Canada) with 343 passengers…
Jet Airways B738 enroute on Oct 14th 2011, unqualified pilot monitoring
A Jet Airways Boeing 737-800, registration VT-JGK performing flight 9W-481 from Mumbai to Chennai (India), had been dispatched with a captain (35,…
Jet Airways B738 at Riyadh on Aug 3rd 2018, rejected takeoff from taxiway results in taxiway excursion
A Jet Airways Boeing 737-800, registration VT-JFS performing flight 9W-523 from Riyadh (Saudi Arabia) to Mumbai (India) with 144 passengers and 7…
Jet Airways AT72 at Indore on Dec 6th 2018, engine fire
A Jet Airways Avions de Transport Regional ATR-72-212A, registration VT-JCN performing flight 9W-794 from Indore to Delhi (India), was climbing…
Jet Airways B738 at Goa on Dec 27th 2016, runway excursion during rejected takeoff
A Jet Airways Boeing 737-800, registration VT-JBG performing flight 9W-2374 from Goa to Mumbai (India) with 154 passengers and 7 crew, backtracked…
Newest articles
Dana MD82 at Lagos on Apr 23rd 2024, runway excursion
A Dana Air McDonnell Douglas MD-82, registration 5N-BKI performing flight 9J-352 from Abuja to Lagos (Nigeria) with 83 passengers and 6 crew, landed…
LATAM Brasil A320 at Brasilia on May 13th 2024, engine shut down in flight
A LATAM Brasil Airbus A320-200, registration PR-MYI performing flight LA-3008 from Sao Paulo Congonhas,SP to Brasilia,DF (Brazil) with 106 people on…
Subscribe today
Are you researching aviation incidents? Get access to AeroInside Insights, unlimited read access and receive the daily newsletter.
Pick your plan and subscribePartner
A new way to document and demonstrate airworthiness compliance and aircraft value. Find out more.
ELITE Simulation Solutions is a leading global provider of Flight Simulation Training Devices, IFR training software as well as flight controls and related services. Find out more.
Your regulation partner, specialists in aviation safety and compliance; providing training, auditing, and consultancy services. Find out more.
AeroInside Blog
Popular aircraft
Airbus A320Boeing 737-800
Boeing 737-800 MAX
Popular airlines
American AirlinesUnited
Delta
Air Canada
Lufthansa
British Airways