PIA plane tyres burst during landing

Abbas Ali · Post by **Abbas Ali** » Mon Jul 03, 2006 6:11 am

KARACHI: The tyres of a PIA flight burst during landing at Islamabad Airport on Sunday (July 2, 2006). PIA flight PK-308 coming from Karachi landed at Islamabad Airport and all its four tyres burst when its captain Farooq Sheikh applied emergency brakes. Two tyres were available at airport for replacement while two others were dispatched from Karachi through another flight PK 370. All the passengers escaped unhurt.

Source: The News (July 3, 2006)

PALPA · Post by **PALPA** » Mon Jul 03, 2006 7:01 am

Capt. Farukh Shafiq
F/O. Mujeeb Ahmed

yeah! and one thing more there are no such brakes as emergency brakes.

mohammed younis · Post by **mohammed younis** » Mon Jul 03, 2006 7:04 am

any reason why the captain had applied the emergency brakes?

Abbas Ali · Post by **Abbas Ali** » Mon Jul 03, 2006 7:20 am

Aircraft escapes accident

KARACHI, July 2: A PIA Airbus A310 escaped accident as four of its tyres burst on Sunday during the landing run at the Islamabad airport. Passengers and the crew, however, remained unhurt.

Sources said the incident occurred as the captain of flight PK-308 from Karachi applied brakes. They said there were two spare tyres available at Islamabad and the airline had shipped two more tyres from Karachi. The incident delayed the return flight from Islamabad, they said.

Source: DAWN

inducedrag · Post by **inducedrag** » Mon Jul 03, 2006 7:21 am

Deflation of tyres is a common thing in Islamabad as after landing at ISB you have to make a 180 deg turn on runway which is not a common thing in other civilian airports with hot tires and brakes making sharp turns wear out the tyres and they require replacement STRANGE is in ISLAMABAD where at least more than 10 arrivals and departures per day they don't have spare tyres poor maintenance

Adnaan786 · Post by **Adnaan786** » Mon Jul 03, 2006 7:29 am

It could have been due to a poor landing, or an aircraft malfunction. Having to use such hard breaking is not very common.

cheetah · Post by **cheetah** » Mon Jul 03, 2006 10:28 am

Also happens because some pilots dont want to make the the 180 degree turn and the trek back. So they apply excessive brakes to bring the aircraft to a halt before the exit.

iqbal · Post by **iqbal** » Mon Jul 03, 2006 11:18 am

hard braking is applied when the autobrake switch is set to "Max" setting. A lower setting will apply full brakes upon touchdown and then will relieve brake pressure once reverser is unlocked. At max autobrake full brake pressure is applied until the aircraft stops - at ISB this may have been due to a late touchdown.

As for the early exit at ISB I have no hesitation in saying that no pilot will try and stop as early as that - the RW30 touchhdown zone is at the crossing point of runway 30/12 and 09/27 (which is disused) - this point is after the taxiway that leads from the main apron onto RW30.

Regards

mohammed younis · Post by **mohammed younis** » Mon Jul 03, 2006 1:34 pm

it would be interesting to know how much one of these tyres cost???

AN · Post by AN » Mon Jul 03, 2006 3:33 pm

1. Tyres do no burst due to 180 degree turns at the end of the runway. It is usualy due to excessive braking, however there are many other causes.

2. The aircraft can only be turned around at the dumbell at the end of the runway, not anywhere in the middle hence excessive braking to reduce time spent backtracking is useless as the aircraft will have to taxi till the end of the runway to turn around.

R.F. · Post by **R.F.** » Mon Jul 03, 2006 5:57 pm

Quite right AN, if tyres were to burst after every 180 deg. turn then the cost would be enormous. Peshawar, Lahore and many other airfields in and around this region have dumbells assisiting in making 180 deg turns 'cause that's exactly what their purpose is.

'Max' AB is what exactly it states max braking for minimum stopping distance and is never selected/used for landings. Thier purpose is for take off only in the event of an RTO (rejected take off).
Moreoever landing on RW30 (ISB) impossible to vacate via Taxiway 'A' even 'B' is improbable. In effect the whole length of the runway is utilized with a 180 turn at the end, standard paractice and nothing out of the ordinary.

Abbas Ali · Post by **Abbas Ali** » Mon Jul 03, 2006 6:42 pm

Aircraft was Airbus A310-308 (registration AP-BEC) according to Umar Anis (forum member umar744).

F.K · Post by **F.K** » Mon Jul 03, 2006 7:47 pm

the crews been called in for an enquiry cus the flight was apparently a vip one with some high profile govt doctors travelling. my cousin was one of the pilots . i hope they are absolved duly.

PALPA · Post by **PALPA** » Tue Jul 04, 2006 4:18 am

This was`nt a VIP flight although PK309 was.Secondly i`d like to repeat again that there is so brake such as emergency brake and media is making lot of rubbish stuff out of it

R.F. · Post by **R.F.** » Tue Jul 04, 2006 4:44 pm

Hate to contradict PALPA but there are emergency brakes incase the main ones fail. On the A310 they're refered to as ALTERNATE - ON (with limited number of antiskids) and ALTERNATE - OFF (No antiskid-only on accumulators) with limited number of applications.

Now that'll depend whether they had a brake failure indication and may be landed on accumulators, hence the reason for tyre burst since no Anti Skid available. Investigation will reveal which may never be made public for obvious reasons.
Thanks !