Golden Myanmar AT72 at Yangon on Aug 2nd 2019, nose wheels separated on landing
Last Update: August 14, 2020 / 16:56:34 GMT/Zulu time
Incident Facts
Date of incident
Aug 2, 2019
Classification
Accident
Airline
Golden Myanmar Airlines
Flight number
Y5-506
Departure
Mandalay, Myanmar
Destination
Yangon, Myanmar
Aircraft Registration
XY-AJM
Aircraft Type
ATR ATR-72-200
ICAO Type Designator
AT72
Airport ICAO Code
VYYY
Myanmar's DCA (Directorate of Civil Aviation) reported the landing gear failed while landing in Yangon at 16:37L, the runway needed to be closed for a couple of hours. A heavy downpour took place at the time of landing.
The airport was able to re-open about 2 hours after landing.
On Aug 14th 2020 Myanmar's AAIB released their final report concluding the probable causes of the occurrence were:
- When the aircraft was on short finals, the power setting was inappropriate and the approach speed exceeded the stabilized approach speed criteria.
- The PIC decided to continue with the landing despite the destabilized approach and being advised to conduct a go-around by the Co-pilot.
- Due to insufficient flare, the nose gear of the aircraft contacted the runway first instead of the main gears in a normal landing. The excessive load on the nose gear as a result of the aircraft's abnormal landing attitude resulted in the nose gear collapsing.
The AAIB summarized the sequence of events:
They received the aerodrome information from Yangon Control Tower, "Heavy rain on the runway, visibility less than 1.2 nm". Thereafter the PIC took the control of the aircraft from the Co-pilot.
Because of heavy rain, the aerodrome operations were suspended. Consequently, the aircraft made the holding over HGUVOR at attitude 10000ft for about 25 min as per ATC's instruction.
After about 25 min holding, the visibility over the Yangon International Airport improved and aircraft were permitted to land. The incident aircraft made a descent to 3000ft and cleared for ILS approach to Runway 21.
The ATC instructed to the aircraft to report back when the approach lights were insight. When the aircraft was about 3.5nm from the runway, the approach lights were visible and the flight crew reported to the ATC that the approach lights were insight.
When the aircraft was about 1.5 nm from the runway, the rain intensity increased. The Co-pilot asked the PIC whether to go around or stabilized. The PIC replied that the runway was insight, so he continued to land the aircraft.
The aircraft landed with a nose down attitude on the runway 21. It bounced
four times forward and came to stop about 7000 ft from the threshold of runway 21. The aircraft encountered a nose gear axle rupture and the right nose wheel broke off.
The captain (57, ATPL, 19,929 hours total, 4,635 hours on type) initally was pilot monitoring but assumed the role as pilot flying for the landing, the first officer (42, ATPL, 6,219 hours total, 2,327 hours on type) was pilot flying and assumed the role as pilot monitoring during the landing.
The AAIB analysed that the entire descent and approach was flown on autopilot, the autopilot was disengaged at 120 feet AGL, gear was down, flaps at position 33 degrees, 129 KIAS (Vapp+13), 2.91 degrees nose down, winds from 271 degrees at 17 knots. Over the next 15 seconds the winds decreased to 12 knots, the IAS varied between 125 and 129 KIAS, the rate of descent decreased from 600 to 130 fpm. After the aircraft descended through 15 feet AGL two nose down inputs setting the nose to 1.8 degrees nose down and control inputs to decrab were recorded, the rate of descent increased.
The aircraft touched down at 1.58 degrees nose down at +1.833G, bounced three times. The AAIB stated: "In the period between the autopilot disengagement and until the aircraft came to a complete stop on the runway, no TAWS windshear caution and sink rate warning was recorded. The last valid data was recorded at 16:37:01 where the groundspeed was 0kt at GPS coordinates of N16.907425 E96.133296, consistent with final position of the aircraft on Runway 21. "
The AAIB analysed the aircraft should have gone around and stated in the findings: "It was determined that the aircraft was not stabilized on approach to runway 21 of the Yangon International Airport. The flare was not initiated, in addition, and before touchdown, a nose down order was applied on the control column. The aircraft bounced 4 times along the runway during 7 seconds. During the successive bounces, nose down effort was maintained. "
Metars:
VYYY 021200Z 18006KT 4000 RA BKN014 FEW018CB OVC100 26/26 Q1005 TEMPO 3000 RA=
VYYY 021130Z 18008KT 4000 RA BKN013 FEW018CB OVC100 26/26 Q1005=
VYYY 021100Z 21008KT 5000 RA BKN013 FEW018CB OVC100 26/26 Q1005=
VYYY 021030Z 21008KT 4000 RA BKN013 FEW018CB BKN090 26/26 Q1004 TEMPO 5000 -RA=
VYYY 021000Z 21009KT 3000 RA BKN013 FEW018CB BKN090 26/26 Q1004 TEMPO 5000 -RA=
VYYY 020930Z 22005G15KT 3000 RA BKN013 FEW018CB BKN090 27/27 Q1004 TEMPO 5000 -RA=
VYYY 020900Z 22005G15KT 3000 RA BKN013 FEW018CB BKN090 30/25 Q1004 TEMPO 5000 -RA=
VYYY 020837Z 21005KT 6000 DZ BKN012 FEW016CB BKN090 30/25 Q1004 NOSIG=
VYYY 020800Z 21005G15KT 3000 RA BKN012 FEW016CB BKN090 29/27 Q1004 NOSIG=
VYYY 020730Z 22008KT 7000 BKN015 FEW020CB BKN100 31/25 Q1005 NOSIG=
VYYY 020700Z 21008KT 7000 BKN015 FEW020CB BKN100 31/25 Q1005 NOSIG=
VYYY 020630Z 27009KT 7000 BKN015 FEW020CB BKN100 31/25 Q1005 NOSIG=
VYYY 020600Z 25006KT 7000 BKN013 FEW018CB OVC100 30/25 Q1006 NOSIG=
Incident Facts
Date of incident
Aug 2, 2019
Classification
Accident
Airline
Golden Myanmar Airlines
Flight number
Y5-506
Departure
Mandalay, Myanmar
Destination
Yangon, Myanmar
Aircraft Registration
XY-AJM
Aircraft Type
ATR ATR-72-200
ICAO Type Designator
AT72
Airport ICAO Code
VYYY
This article is published under license from Avherald.com. © of text by Avherald.com.
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