CFIT Incident – Urgently need your help to find a case study!

[cavok86]

Hi,

I am writing a report on CFIT and the effectiveness of GPWS, EGPWS and TAWS but I need a case study.

I have some CFIT accident case studies already but what I really need is an example of GPWS saving an aircraft. If possible an example of a big jet GPWS alert where the flight crew were able to avoid the bumping into a hill part.

This is urgent so if you have any ideas please let me know as soon as you can!

Thanks,
Cavok86.

[alf5071h]

From the ICAO safety information exchange - Celebrating TAWS ‘Saves’: But lessons still to be learnt.
See the EGPWS website for some positive statistics.

[cavok86]

Thanks Alf you are an absolute legend!

I took one of the incidents from the back of the report to use as a case study and the paper from ICAO fills in some important blanks in my history of GPWS section.

Thank you for your help,
Cavok86.

[alf5071h]

More background information:- CFIT and ALAR.
Also see Causes and remedies of controlled flight into terrain in military and civil aviation.

[cavok86]

Rules & Regs

I am now trying to find the rules and regulations on the carriage of GPWS, EGPWS and TAWS, an idea where I should look?

I am looking for anything from ICAO, the JAA, the CAA, EASA, or anywhere official.

Thanks,
Cavok86

[alf5071h]

ICAO Annex 6 ‘Operation of Aircraft’, applies to all States (National Authorities).

6.15.1 All turbine-engined aeroplanes of a maximum certificated take-off mass in excess of 5 700 kg or authorized to carry more than nine passengers shall be equipped with a ground proximity warning system.

Various amendments to this and the documents below, upgrade the requirement to require a predictive function i.e. EGPWS / TAWS.

JAA (EASA) JAR-OPS 1, Regulation – Applies to all Operators.

1.665 Ground proximity warning system and terrain awareness warning system.
(a) An operator shall not operate a turbine powered aeroplane having a maximum certificated take-off mass in excess of 5 700 kg or a maximum approved passenger seating configuration of more than 9 unless it is equipped with a ground proximity warning system.

FAA, FAR 121, 91, and 135, also AC25-23. Similar to JAR, but there are some significant dispensations e.g. cargo/freight operations excluded !!!!

121.354 …. no person may operate a turbine-powered airplane unless that airplane is equipped with an approved terrain awareness and warning system, including a terrain awareness display, that meets the requirements for Class A equipment of TSO-C151a.

[aeroconejo]

there's a good training video in the Jeppesen 'Flightime' collection.....it's entitled CFIT...Awareness and prevention. Three case studies are presented very well and I use them in CRM/Safety training regularly.

There is also a CFIT checklist which you can download from the Flight Safety Foundation website.

aero

[efcop]

A long time ago there was a DC8 flying into Quito, Ecuador that was saved by an early Generation GPWS. I don't have all the details but maybe with all your already done research you might be able to dig up some info. I believe it was in the early eighties. The crew began the VOR approach using the wrong VOR i.e. the descent was initiated too early. When the GPWS sounded the crew pushed the throttles to their mechanical stops and flew parallel to the mountain the RA indicating between 150 and 200 ft until they were clear of the mountain.

good luck with you report
efcop