Contact

The Civil Aviation Authority of Thailand
Aeronautical Information Service Department
333/105 Lak Si Plaza, Khamphaeng Phet 6 Rd.
Talat Bang Khen, Lak Si, Bangkok 10210, Thailand

Tel: +662 568 8831

Fax: +662 576 1903

AFS: VTBAYOYX

Email: aisthai@caat.or.th

Email: ais@caat.or.th

AIP Supplement for Thailand

AIRAC AIP SUP

A 19/17

Effective from 20 JUL 2017

to UFN

Published on 08 JUN 2017

  AIRCRAFT TRANSPONDER FAILURE PROCEDURES IN BANGKOK FIR

  INTRODUCTION

This section supplements the following portion(s) of the AIP: AD

  With effect from 20 July 2017, Aircraft transponder failure procedure will be implemented in Bangkok FIR following:

  AIRCRAFT TRANSPONDER FAILURE PROCEDURES

  Control of aircraft experiencing transponder failure procedure.

  When a transponder failure is detected to be unserviceable prior to departure ATC shall confirm with the pilot of his transponder operations using the following phraseologies.

Phraseologies

“C/S, CONFIRM TRANSPONDER ON”; or

“C/S, CHECK YOUR TRANSPONDER OPERATED NORMALLY”; or

“C/S, TRANSPONDER NOT RECEIVED, CHECK FUNCTIONALITY”

When it has been confirmed that aircraft transponder fails, ATC shall advice the pilot to repair it before departure. However, the surface radar blind spot, where the transponder might not be easily detected, should be taken into consideration.

Phraseologies

“C/S, ADVISE TRANSPONDER REPAIRED BEFORE DEPARTURE”; or

“C/S, ADVISE RETURN TO BAY FOR TRANSPONDER REPAIRING”

  When transponder appears to be unserviceable after the aircraft is airborne ATC must inform the pilot of his transponder failure using the following phraseologies.

Phraseologies

“C/S, CONFIRM TRANSPONDER ON”; or

“C/S, CHECK YOUR TRANSPONDER OPERATED NORMALLY”; or

“C/S, TRANSPONDER NOT RECEIVED, CHECK FUNCTIONALITY”

When it has been confirmed that the aircraft transponder fails, ATC shall advice the pilot to return to his departure airport as well as relay all necessary information to Aerodrome Control Tower and all concerned units.

Phraseologies

“C/S, ADVISE RETURN TO LAND AT (DEPARTURE AERODROME) FOR TRANSPONDER REPAIRING, REQUEST YOUR INTENTION”;

“C/S, ADVISE RETURN TO BAY FOR TRANSPONDER REPAIRING”

In case pilot decide to proceed to first intended landing or nearest suitable aerodrome, primary radar separation shall be provided. However, the pilot shall be reminded that delays can be expected and some requests might not be granted e.g. route to be flown, cruising altitude/level.

  Control of aircraft overflying the Bangkok FIR or aircraft intending to land at Suvarnabhumi International Airport with its failed transponder procedure

  1. ATC must immediately inform the pilot of his transponder failure so that he could check its operations and repair it.

  2. ATC shall control, according to the filed flight plan, the aircraft experiencing transponder failure to land safely at Suvarnabhumi International Airport.

  3. ATC shall control, according to the filed flight plan, the over- fly aircraft experiencing transponder failure to land safely at the destination aerodrome.

  4. Approach Control shall coordinate closely with Suvarnabhumi Tower and/ or other concerned units regarding the problem.

  The above procedures shall be applied to all aircraft except state aircraft and military aircraft.

  Aircraft intending to land at Suvarnabhumi International Airport with its failed transponder might be assigned to fly along an RNAV STAR and controlled solely by Suvarnabhumi PSR which normally covers up to 80 NM.

  FOR FURTHER INFORMATION CONTACT

  Unit : Aeronautical Information Service Department, The Civil Aviation Authority of Thailand

Tel. : +662 568 8830 or +662 568 8831

Mobile : +666 3205 8831

Fax : +662 576 1903

E-mail : aisthai@caat.or.th or ais@caat.or.th

  VALIDITY

  This AIRAC AIP Supplement will remain current until its contents have been incorporated in AIP-Thailand.