Narrative:
SpiceJet flight SG6237, a Boeing 737-800, suffered a runway excursion after landing on runway 27 at Mumbai, India in moderate to heavy rain.
The flight departed Jaipur International Airport with the captain as Pilot Flying.
The pilots had carried out briefing for the approach including the weather and go around actions, if required. The aircraft commenced descent into Mumbai in the late evening hours. As per the reported weather at the time of approach visibility was 2100 metres in rain. Reported winds were 090/12 Knots. Runway was wet and the trend provided was "temporary reduction in visibility to 1500 metres with thunder/ showers of rain".
During descend at an IAS disagree warning was observed, indicating a discrepancy of airspeed between the instrument sources for the flight crew. Although this indication was momentary, the Non-Normal Checklist was carried out. The indication discrepancy did not recur for the remainder of the flight.
The aircraft was radar vectored for an ILS approach for Runway 27 at Mumbai. The approach was stabilized by 38700 feet with landing gear down and flaps 30 and auto brake selected at 3. The autopilot was engaged throughout the descent phase and during approach, the second autopilot was coupled for the ILS approach. At 100 feet, the autopilot and the auto-throttle were disengaged by the PF. The flare manoeuvre consumed approximately 5807 feet of the runway length prior to touchdown with 3881 feet runway remaining. After touchdown, the speed brakes deployed automatically and maximum reverse thrust and wheel brakes were applied. The aircraft exited the paved surface at 65 Knots and came to rest at a distance of 615 feet beyond the end of the runway. The nose landing gear had collapsed.
Once the aircraft came to rest, the flight crew advised cabin crew to be at their stations. The pilots were unable to contact ATC through VHF communication. The PF contacted his airline personnel using mobile phone and informed that the aircraft had overrun the runway and requested for step ladders. The ATC activated fire services and the runway was closed for operation. An assessment of the aircraft structure and occupants was made and the fire services personnel informed the cabin crew that deplaning was to be carried out using fire ladders. There were no injuries during evacuation or otherwise.
Probable Cause
The runway excursion occurred because of combination of:
- Disconnection of auto pilot at an altitude 118' RA with the nose up trim bias without adequate compensation.
- Disconnection of auto throttle at 118' RA at a higher thrust setting for that phase of flight.
- Late touchdown of the aircraft on the runway.
- Reduced visual cues due to heavy rain impacting depth perception and ascertaining of actual touchdown position.
- Tailwind conditions at the time of landing resulting In increasing the distance covered during the extended flare (float).
- Approach with lower flaps (30) than recommended (40).
Runway excursion (overrun)
» timesofindia.indiatimes.com
VABB 011800Z 15005KT 2100 -TSRA SCT010 SCT018 FEW030CB OVC080 25/25 Q1003 TEMPO 1500 +RA
18:30 UTC / 00:00 local time:
VABB 011830Z 32010KT 1000 R27/1800 TSRA SCT008 BKN015 FEW030CB OVC080 25/25 Q1003 TEMPO 0600 +TSRA
| Status: | Accident investigation report completed and information captured |
| Date: | Monday 1 July 2019 |
| Time: | 23:51 |
| Type: |  Boeing 737-85R |
| Operator: | SpiceJet |
| Registration: | VT-SYK |
| MSN: | 30410/1228 |
| First flight: | 2002-10-10 (16 years 9 months) |
| Engines: | 2 CFMI CFM56-7B24 |
| Crew: | Fatalities: 0 / Occupants: 7 |
| Passengers: | Fatalities: 0 / Occupants: 160 |
| Total: | Fatalities: 0 / Occupants: 167 |
| Aircraft damage: | Substantial |
| Location: | Mumbai-Chhatrapati Shivaji International Airport (BOM) ( India)
|
| Phase: | Landing (LDG) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Jaipur International Airport (JAI/VIJP), India |
| Mumbai-Chhatrapati Shivaji International Airport (BOM/VABB), India | |
| Flightnumber: | SG6237 |
SpiceJet flight SG6237, a Boeing 737-800, suffered a runway excursion after landing on runway 27 at Mumbai, India in moderate to heavy rain.
The flight departed Jaipur International Airport with the captain as Pilot Flying.
The pilots had carried out briefing for the approach including the weather and go around actions, if required. The aircraft commenced descent into Mumbai in the late evening hours. As per the reported weather at the time of approach visibility was 2100 metres in rain. Reported winds were 090/12 Knots. Runway was wet and the trend provided was "temporary reduction in visibility to 1500 metres with thunder/ showers of rain".
During descend at an IAS disagree warning was observed, indicating a discrepancy of airspeed between the instrument sources for the flight crew. Although this indication was momentary, the Non-Normal Checklist was carried out. The indication discrepancy did not recur for the remainder of the flight.
The aircraft was radar vectored for an ILS approach for Runway 27 at Mumbai. The approach was stabilized by 38700 feet with landing gear down and flaps 30 and auto brake selected at 3. The autopilot was engaged throughout the descent phase and during approach, the second autopilot was coupled for the ILS approach. At 100 feet, the autopilot and the auto-throttle were disengaged by the PF. The flare manoeuvre consumed approximately 5807 feet of the runway length prior to touchdown with 3881 feet runway remaining. After touchdown, the speed brakes deployed automatically and maximum reverse thrust and wheel brakes were applied. The aircraft exited the paved surface at 65 Knots and came to rest at a distance of 615 feet beyond the end of the runway. The nose landing gear had collapsed.
Once the aircraft came to rest, the flight crew advised cabin crew to be at their stations. The pilots were unable to contact ATC through VHF communication. The PF contacted his airline personnel using mobile phone and informed that the aircraft had overrun the runway and requested for step ladders. The ATC activated fire services and the runway was closed for operation. An assessment of the aircraft structure and occupants was made and the fire services personnel informed the cabin crew that deplaning was to be carried out using fire ladders. There were no injuries during evacuation or otherwise.
Probable Cause:
Probable Cause
The runway excursion occurred because of combination of:
- Disconnection of auto pilot at an altitude 118' RA with the nose up trim bias without adequate compensation.
- Disconnection of auto throttle at 118' RA at a higher thrust setting for that phase of flight.
- Late touchdown of the aircraft on the runway.
- Reduced visual cues due to heavy rain impacting depth perception and ascertaining of actual touchdown position.
- Tailwind conditions at the time of landing resulting In increasing the distance covered during the extended flare (float).
- Approach with lower flaps (30) than recommended (40).
Accident investigation:
 |
|
Classification:
Late landingRunway excursion (overrun)
Sources:
» thehindu.com» timesofindia.indiatimes.com
METAR Weather report:
18:00 UTC / 23:30 local time:VABB 011800Z 15005KT 2100 -TSRA SCT010 SCT018 FEW030CB OVC080 25/25 Q1003 TEMPO 1500 +RA
18:30 UTC / 00:00 local time:
VABB 011830Z 32010KT 1000 R27/1800 TSRA SCT008 BKN015 FEW030CB OVC080 25/25 Q1003 TEMPO 0600 +TSRA
Follow-up / safety actions
AAIB India issued 7 Safety Recommendations
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Photos
Video, social media
Air India officials confirm. The operation to extricate SpiceJet flight stuck off Runway 27 of Mumbai airport will begin only after that. MORE DETAILS TO EMERGE. pic.twitter.com/m3d2WveogL
Vithesh (@VitheshNaik) July 2, 2019
Some #fwd pics. #mumbai #airport @flyspicejet. pic.twitter.com/kNusbUl6f7
Tarun Shukla (@shukla_tarun) 2 juli 2019
Map
This map shows the airport of departure and the intended destination of the flight. The line is connecting ADS-B datapoints from Flightradar24.
Distance from Jaipur International Airport to Mumbai-Chhatrapati Shivaji International Airport as the crow flies is 906 km (566 miles).
Accident location: Approximate; accuracy within a few kilometers.
Distance from Jaipur International Airport to Mumbai-Chhatrapati Shivaji International Airport as the crow flies is 906 km (566 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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