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Crash of a Boeing 737-408 in Batam

Date & Time: Mar 10, 2008 at 1020 LT
Type of aircraft:
Operator:
Registration:
PK-KKT
Survivors:
Yes
Schedule:
Jakarta - Batam
MSN:
24353/1721
YOM:
1989
Flight number:
DHI292
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
171
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
On 10 March 2008, a Boeing Company 737-400 aircraft, registered PK-KKT, was being operated by Adam SkyConnection Airlines (Adam Air) as scheduled passenger flight with flight number DHI292. The flight departed Soekarno – Hatta Airport, Jakarta at 01:30 UTC with destination Hang Nadim Airport, Batam and the estimated time of arrival was 03:05 UTC. On board in this flight were 177 people consisted of two pilots, four flight attendants, and 171 passengers. The Pilot in Command (PIC) acted as pilot flying (PF) and the Second in Command (SIC) acted as pilot monitoring (PM). The flight until commencing descend was uneventful. Prior to descend, the flight crew received weather information indicating that the weather was fine. At 0302 UTC the flight crew contacted Hang Nadim tower controller and informed them that the visibility was 1,000 meters and they were sequence number three for landing runway 04. The flight crew of the aircraft on sequence number two informed to Hang Nadim tower controller that the runway was insight at an altitude of about 500 feet. The Hang Nadim tower controller forwarded the information to the flight crew of DHI 292, and followed this by issuing landing clearance, and additional information that the wind velocity was 360 degrees at 8 knots and heavy rain. The DHI 292 flight crew acknowledged the information. The landing configuration used flaps 40 degrees with landing speed of 136 knots. The flight crew were able to see the runway prior to the Decision Altitude (DA), however the PIC was convinced that continuing the approach to landing was unsafe and elected to go around. The Hang Nadim tower controller instructed the flight crew to climb to 3000 feet, maintain runway heading, and contact Singapore Approach. At 0319 UTC, DHI 292 was established on the localizer runway 04, and the Hang Nadim tower controller informed them that the visibility improved to 2,000 meters. While on final approach, the flight crew DHI 292 reported that the runway was in sight and the Hang Nadim tower controller issued a landing clearance. On touchdown, the crew felt that the main wheels barely touch the runway first. During the landing roll, as the ground speed decreased below 30 knots, the aircraft yawed to the right. The flight crew attempted to steer the aircraft back to centerline by applying full left rudder. The aircraft continued yaw to the right and came to stop on the runway shoulder at approximately 40 meters from the right side of the runway edge, and 2,760 meters from the runway 04 threshold. No one was injured in this accident. The aircraft was seriously damaged with the right main landing gear assembly detached and collapsing backward and damaging the right wing and flaps. The right engine was displaced from its attachment point.
Probable cause:
The Flight Data Recorder (FDR) and the Cockpit Voice Recorder (CVR) data were downloaded. The CVR data showed that the aircraft was flying below the correct glide path indicated by a glide slope aural warning, and the crew had difficulty in recovering the condition. The CVR also recorded landing gear warning after touchdown which indicated the landing gear had collapsed. The FDR data showed that the vertical acceleration during landing was 2.97 g, however this amount of vertical acceleration should not damage the landing gear. The FDR data showed that just after touchdown, the right main landing gear collapsed. The FDR also recorded that the aircraft experienced hard landing and had bounced on a previous flight, and the value of the vertical acceleration recorded was 1.78 g. It was most likely that the hard landing and bounce had affected the strength of the landing gear. The examination of the failed landing gear also found corrosion on the fracture surface of the right main landing gear strut.
Final Report:

Crash of a Boeing 737-33A in Surabaya

Date & Time: Feb 21, 2007 at 1525 LT
Type of aircraft:
Operator:
Registration:
PK-KKV
Survivors:
Yes
Schedule:
Jakarta - Surabaya
MSN:
27284/2606
YOM:
1994
Flight number:
DHI172
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
148
Pax fatalities:
Other fatalities:
Total fatalities:
0
Aircraft flight hours:
37936
Aircraft flight cycles:
23824
Circumstances:
The aircraft was on a scheduled passenger flight from Soekarno-Hatta Airport, Jakarta to Juanda Airport, Surabaya, East Java. There were 155 persons on board, consist of 7 crew and 148 passengers. During the flight there was no abnormality declare by the flight crew. Weather condition at Surabaya was thunderstorm and rain, wind 240/7 knots with visibility 8,000 meters. The CVR revealed that there was conversation in the cockpit that was not related to the progress of the flight, the conversation was relating to the company fuel policy and training program until 2000 feet. The CVR did not reveal approach briefing and any checklist reading. On final approach of runway 28 passing 800 feet approach light insight and landing clearance was received. Prior to touchdown, control of the aircraft was transferred from co-pilot to PIC. The CVR recorded that the Ground Proximity Warning Systems (GPWS) warned “Sink Rate” and “Pull Up”. The right wheel track was found out of the runway for about 4 meter away and return to the runway. The aircraft stopped for about 100 meters from taxiway N3. After aircraft touched down, the fuselage aft of passenger seat row 16 was bended down. The passengers were panic. Flight attendants evacuated the passengers via all exits available and door slides were inflated. The two passengers were minor injured, and the aircraft suffered severe damage.
Probable cause:
From the findings, it is concluded that the aircraft experienced excessive sink rate upon the touch-down. The aircraft was in unstable approach even at below 200 feet. The high vertical acceleration caused severe damage to the aircraft structure. The flight crew did not comply to several procedures published by the Boeing company. The flight crew did not respond to the GPWS alert and warnings.
Final Report:

Crash of a Boeing 737-4Q8 off Ujung Pandang: 102 killed

Date & Time: Jan 1, 2007 at 1459 LT
Type of aircraft:
Operator:
Registration:
PK-KKW
Flight Phase:
Survivors:
No
Schedule:
Jakarta – Surabaya – Manado
MSN:
24070
YOM:
1989
Flight number:
DHI574
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
96
Pax fatalities:
Other fatalities:
Total fatalities:
102
Captain / Total flying hours:
13356
Captain / Total hours on type:
3856.00
Copilot / Total flying hours:
4200
Copilot / Total hours on type:
998
Aircraft flight hours:
45371
Aircraft flight cycles:
26725
Circumstances:
On 1 January 2007, a Boeing Company 737-4Q8 aircraft, registered PK-KKW, operated by Adam SkyConnection Airlines (AdamAir) as flight number DHI574, was on a scheduled passenger flight from Surabaya (SUB), East Java to Manado (MDC), Sulawesi, at FL350 (35,000 feet) when it disappeared from radar. The aircraft departed from Djuanda Airport, Surabaya at 05:59 Coordinated Universal Time (UTC) under the instrument flight rules (IFR), with an estimated time of arrival (ETA) at Sam Ratulangi Airport, Manado of 08:14. The fuel endurance on departure from Surabaya was hours 30 minutes, and the crew had flight planned for an alternate of Gorontalo (GTO). The pilot in command (PIC) was the pilot flying for the sector to Manado and the copilot was the monitoring/support pilot. There were 102 people on board; two pilots, 4 cabin crew, and 96 passengers comprised of 85 adults, 7 children and 4 infants.
Probable cause:
The following findings were identified:
1) Flight crew coordination was less than effective. The PIC did not manage the task sharing; crew resource management practices were not followed.
2) The crew focused their attention on troubleshooting the Inertial Reference System (IRS) failure and neither pilot was flying the aircraft.
3) After the autopilot disengaged and the aircraft exceeded 30 degrees right bank, the pilots appeared to have become spatially disoriented.
4) The AdamAir syllabus of pilot training did not cover complete or partial IRS failure.
5) The pilots had not received training in aircraft upset recovery, including spatial disorientation.
Other Causal Factors:
1) At the time of the accident, AdamAir had not resolved the airworthiness problems with the IRS that had been reoccurring on their Boeing 737 fleet for more than 3 months.
2) The AdamAir maintenance engineering supervision and oversight was not effective and did not ensure that repetitive defects were rectified.
Final Report: