KLM B772 at Amsterdam on Dec 3rd 2020, transponder problems

Last Update: December 6, 2020 / 23:07:55 GMT/Zulu time

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Incident Facts

Date of incident
Dec 3, 2020

Classification
Incident

Cause
Transponder problem

Airline
KLM

Flight number
KL-759

Departure
Amsterdam, Netherlands

Destination
San Jose, Costa Rica

Aircraft Registration
PH-BQE

Aircraft Type
Boeing 777-200

ICAO Type Designator
B772

A KLM Boeing 777-200, registration PH-BQE performing flight KL-759 from Amsterdam (Netherlands) to San Jose (Costa Rica), was climbing out of Amsterdam's runway 24 when the aircraft transponder did not transmit any altitude information while all other data continued to be transmitted. While the crew was working the checklists trying to restore the transponder functionality, the aircraft continued the climb. Amsterdam radar needed to tell the crew however, that the UK would not accept the aircraft without a functioning Mode-C transponder, the crew advised they were not aware of the problem prior to departure. After consultation with dispatch and maintenance the crew decided to return to Amsterdam where the aircraft landed safely on runway 18R about 60 minutes after departure.

A replacement Boeing 777-200 registration PH-BQC reached San Jose with a delay of 3:20 hours.

The occurrence aircraft returned to service about 23 hours after landing back in Amsterdam, this time with fully working transponder again.

The occurrence aircraft had arrived into Amsterdam from Argentina with a transponder, that had failed near Cape Verde during the flight, see Incident: KLM B772 near Cape Verde on Dec 3rd 2020, transponder problems. The aircraft had remained on the ground for about 5 hours before departing for this occurrence flight.
Aircraft Registration Data
Registration mark
PH-BQE
Country of Registration
Netherlands
Date of Registration
Lmeknhfn lmqelpfe Subscribe to unlock
Airworthyness Category
H Aikeq Subscribe to unlock
Legal Basis
Hjpc Subscribe to unlock
Manufacturer
The Boeing Company
Aircraft Model / Type
777-200
ICAO Aircraft Type
B772
Year of Manufacture
Ngqp Subscribe to unlock
Serial Number
Lhnjh Subscribe to unlock
Aircraft Address / Mode S Code (HEX)
Mqkphh Subscribe to unlock
Maximum Take off Mass (MTOM) [kg]
HmAfn Subscribe to unlock
Engine Count
H Subscribe to unlock
Engine
Jqchgbiipgcnfjdp fkAchmjqn qdccc qhmnhmglkAAn Subscribe to unlock
Engine Type
Fkcfkicpf Subscribe to unlock
Incident Facts

Date of incident
Dec 3, 2020

Classification
Incident

Cause
Transponder problem

Airline
KLM

Flight number
KL-759

Departure
Amsterdam, Netherlands

Destination
San Jose, Costa Rica

Aircraft Registration
PH-BQE

Aircraft Type
Boeing 777-200

ICAO Type Designator
B772

This article is published under license from Avherald.com. © of text by Avherald.com.
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