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1.6 Aircraft Information
1.6.1 Aircraft Data
Registration Mark : PK-YVE
Manufacturer : Airbus
Country of Manufacturer : France
Type/ Model : A320 – 321
Serial Number : 441
Date of manufacture : April 1993
Certificate of Airworthiness
Issued : 18 March 2009
Validity : 6 July 2008
Certificate of Registration
Issued : 19 March 2008
Validity : 18 March 2009
Category : Transport
Crew (Cockpit/Cabin) : 2/5
Time Since New : 23,153 hours 33 minutes
Cycles Since New : 30,801
Last C-10 Check : 30 March 2007 (TSN=20,434:2 hrs)
Last D-01 Check : 18 April 2003 (TSN=3852:13 hrs)
Next C-11 Check : 26,434 hrs
Last Event 4 : 14 April 2008 (TSN=22,852 hrs)
Next Event 5 : 26 June 2008
1.6.2 Engine Data
Manufacturer : Rolls Royce
Type/Model : V 2500-A1
Serial Number-1 engine : V 0232
􀂃 Time Since New : 22,516 hrs.
􀂃 Cycles Since New : 29,327 cycles
Serial Number-2 engine : V0259
􀂃 Time Since New : 19,170 hrs
􀂃 Cycles Since New : 28,377 cycles
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1.6.3 Weight and Balance
Load and centre of gravity were within the allowable limits for the landing.
1.6.4 Maintenance
Maintenance had been carried out in accordance with the operators approved
maintenance schedule.
The left landing gear down-lock cable had been broken since the previous landing.
The cable was shorter that the original cable. The cable may have been shortened
during previous maintenance to change the proximity switch, effectively creating
tension on the cable during landing gear extension and retraction cycles.
Figure 5: Broken left landing gear down lock cable
1.7 Meteorological Information
02:00 UTC 02:30 UTC
Wind Calm Calm
Visibility 5,000 m 6,000 m
Weather Haze Haze
Cloud BKN 017 BKN 017
1.8 Aids to Navigation
Not relevant to this serious incident.
1.9 Communications
Not relevant to this serious incident
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1.10 Aerodrome Information
1.10.1 General
Airport Name : Polonia Airport
Airport Identification : WIMM / MES
Coordinate : 03 33 059 N 098 40 094 E
Elevation : 26.50 meters
Airport Operator : Angkasa Pura II
Class : Category 1
Runway Direction : 05 – 23
Runway Length : 2,900 meters
Runway Width : 45 meters
Surface : Asphalt concrete
Address : Polonia International Airport
Jl. Imam Bonjol
Medan, North Sumatera
1.11 Flight Recorders
The flight recorders were recovered from the aircraft on 2 June 2008 under the
supervision of NTSC investigators. The data download and analysis was
conducted by the Australian Transport Safety Bureau in Canberra, Australia.
1.11.1 Digital Flight Data Recorder (DFDR)
Manufacturer : L3 Communications
Type/Model : F–1000
Part Number : S800-3000-00
Serial Number : 000313063
1.11.2 Cockpit Voice Recorder (CVR)
Manufacturer : Fairchild
Type/Model : A100A
Part Number : 93-A100-83
Serial Number : 54416
1.11.3 Notable facts from the CVR
Power was left applied to the recorder after the aircraft came to a stop on the
runway, so much of the CVR data for the flight was over written. Eight minutes of
the flight was available, which covered the final approach and landing.
The cockpit voice recorder revealed that the pilots informed the approach
controller that they had an ‘abnormal condition; a problem with the left main
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landing gear’. The pilots subsequently informed the controller ‘we have runway in
sight and we need to land’. The controller replied, ‘Batavia 591 confirm to go
around and we’ll check your landing gear’. The crew replied ‘negative sir, I say
again negative due to limited fuel’. The controller then cleared them to land and
instructed them to contact the tower.
From an altitude of 400 feet (radio altitude 230 feet) on short final, the ground
proximity warning sounded the alert ‘Too low, gear’ nine times until the
automated command ‘retard’ (for power lever reduction) during the landing flare.
1.11.4 FDR Readout
At 02:46:35, while at an altitude of 3,428 feet, during the landing gear recycling,
the brake pressure increased to 4032 psi. The brake pressure of 4,032 psi remained
constant throughout the approach and landing roll. The aircraft touched down at
02:56:07 and the landing roll took 41 seconds until the aircraft was stopped on the
runway. The flight data recorder showed that the aircraft touched down at at
groundspeed of 126 knots, with a slight tail wind of 5 knots. Flaps were in the 40
　
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本文鏈接地址：Aircraft Serious Incident Investigation Report AIRBUS A320-3(5)