Trigana B734 at Jakarta on Mar 20th 2021, engine failure, subsequent right main gear failure causes runway excursion on landing
Last Update: May 3, 2021 / 10:51:53 GMT/Zulu time
On May 3rd 2021 Indonesia's KNKT released their preliminary report summarizing the sequence of events:
On board in this flight was two pilots, one engineer and one Flight Operation Officer (FOO). According to the weight and balance sheet, the flight carried 16,672 kgs of general cargo and the take-off weight was 60,695 kgs (133,835 lbs). The Pilot in Command (PIC) acted as Pilot Flying (PF) and the Second in Command (SIC) acted as Pilot Monitoring (PM).
At 1051 LT, the aircraft departed Runway 24 of Halim and about two minutes later, the PM reported to the controller that the right engine failed and requested to return.
The aircraft approached landing with one engine inoperative and configured with flap 15 for landing, with the aircraft weight was about 131,000 lbs.
At 1126 LT, the aircraft touched down with 1.79 G vertically and -0.54 G laterally then shortly the right main landing gear failed. The aircraft stopped on the left runway shoulder about 2,200 meters from the beginning Runway 24 and all landing gears collapsed. No one injured in this accident. The aircraft substantially damage.
In a more detailed factual presentation of the sequence of events the KNKT stated following the engine failure the aircraft returned to Halim with one engine inoperative. The KNKT does not mention any problems with the gear extension, states the aircraft performed an ILS approach to runway 24 and concludes the factual chapter:
At 1125 LT, the PM reported to the controller that the Runway was in sight. The controller advised that the wind was from 060° at velocity of 6 knots, QNH 1,007 mbs and issued landing clearance.
The aircraft touched down on the touchdown zone and shortly after, both wheels of the right main landing gear detached. The controller noticed spark appeared from the aircraft and pressed the crash bell.
At 1127 LT, the controller informed pilots of the other aircraft that the runway blocked by the landing aircraft and identified fire on one of the engines. Few seconds later, the PM called the controller whether any fire and was replied by the controller that fire was visible on the left side of the aircraft.
The KNKT describes the damage: "The aircraft was substantially damaged. All three landing gears collapsed. Both engines mounting broken. Two tires and one brake assembly of the right main landing gear were detached while the left main landing gear wheels remained intact until the aircraft stopped."
The captain (34, ATPL, 6,228 hours total, 5,208 hours on type) was pilot flying, the first officer (22, CPL, 1,255 hours total, 1,084 hours on type) was pilot monitoring.
Explaining the FDR data the KNKT stated that both engines operated at 93% N1 until the aircraft reached 145 KIAS, then the right hand engine accelerted to 94% N1, EGT increased to 921 degrees C and two seconds later reduced to 54% N1, EGT decreased to 910 degrees C. 6 seconds after the right hand engine accelerated and 4 seconds after it dropped to 54% N1 the aircraft became airborne. About 8 minutes after becoming airborne the right hand engine reduced to 12% N1 and the fuel flow reduced to 10lbs/hour, the PACK switch was subsequently turned off.
The KNKT describes the tracks on the runway:
The first tire mark was found about 580 meters from the beginning Runway 24 and identified as the mark of the right main wheels, then followed by the tire mark of the left main wheels. All tire marks indicated zigzag movement of the wheels. The zigzag tire marks of the right main wheels ended about 380 meters and continued by zigzag scratch on runway, followed by paint marks. The zigzag tire marks of the left main wheels and the paint marks continued until the aircraft travelled off runway pavement.
One tire of the right main landing gear was found on the right side of the Runway 24, near the tower building after impacted to two cars that were parked. The other wheel was found on the left side of the Runway 24, after impacted to Airport Rescue and Fire Fighting (ARFF) fence. One of the brake assembly of the right main landing gear was found on the left side of the Runway 24, near the wind sock.
A0694/21 NOTAMR A0693/21
A) WIHH B) 2103200840 C) 2103201000 EST
E) RWY 06/24 CLSD DUE TO BLOCKED BY ACFT
A) WIHH B) 2103200500 C) 2103200900
E) RWY 06/24 CLSD DUE TO BLOCKED BY ACFT
WIHH 200630Z 36003KT 4000 HZ SCT018 31/25 Q1005 NOSIG=
WIHH 200600Z 36003KT 3000 HZ SCT017 28/25 Q1006 NOSIG=
WIHH 200530Z 02006KT 3000 -RA SCT017 27/24 Q1006 NOSIG=
WIHH 200430Z 09003KT 3000 HZ FEW020 32/23 Q1007 NOSIG=
WIHH 200400Z 05008KT 3000 HZ FEW020 31/24 Q1007 NOSIG=
WIHH 200330Z 05003KT 4000 HZ FEW020 31/23 Q1008 NOSIG=
WIHH 200300Z 09003KT 4000 HZ FEW020 31/22 Q1008 NOSIG=
WIHH 200230Z 12003KT 4000 HZ FEW020 30/22 Q1008 NOSIG=
WIHH 200200Z 00000KT 4000 HZ FEW020 29/22 Q1008 NOSIG=
WIHH 200130Z 25003KT 4000 HZ FEW020 28/24 Q1008 NOSIG=
WIHH 200100Z 24003KT 4000 HZ FEW020 27/24 Q1008 NOSIG=
This article is published under license from Avherald.com. © of text by Avherald.com.
Read unlimited articles and receive our daily update briefing. Gain better insights into what is happening in commercial aviation safety.
Support AeroInside by sending a small tip amount.
A Trigana Air Services Boeing 737-300, registration PK-YSZ performing a freight flight from Jayapura to Wamena (Indonesia) with 2 crew and 14 tons of…
A Trigana Air Service Boeing 737-300 freighter, registration PK-YSY performing flight IL-7321 from Jayapura to Wamena (Indonesia) with 3 crew and…
A Trigana Air Service Boeing 737-300, registration PK-YSG performing freight flight IL-7341 from Jayapura to Wamena (Indonesia) with 4 crew and 16…
On Dec 29th 2017 the NTSC released their final report concluding the probable causes of the crash were:The deviation from the visual approach…
A Trigana Air de Havilland DHC-6-300 Twin Otter, registration PK-YRU performing a positioning flight from Timika to Enarotali [WABT] (Indonesia) with…
A Myanmar National Airlines Avions de Transport Regional ATR-72-212A, registration XY-AML performing flight UB-149 from Naypyidaw to Loikaw (Maynmar)…
An Oriental Air Bridge de Havilland Dash 8-400 on behalf of ANA All Nippon Airways, registration JA845A performing flight OC-93/NH-4693 from Fukuoka…
Are you researching aviation incidents? Get access to AeroInside Insights, unlimited read access and receive the daily newsletter.Pick your plan and subscribe
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.
Never miss an article from AeroInside. Subscribe to our free weekly newsletter and join 5377 existing subscribers.
Popular aircraftAirbus A320
Boeing 737-800 MAX
Popular airlinesAmerican Airlines