Monday, April 30, 2018

Lion Air PK-LOO JT-892 Departed runway after touchdown

Joining final approach very late may have contributed to a Boeing 737-800 departing the runway 27 at GTO/WAMG Gorontalo Jalaluddin Airport in Indonesia at about 18:35:30L (10:35:30Z).

PK-LOO has visited GTO in the past.

The same runway 27 approach flown by PK-LOO can be plotted using history function, in this case, on 15 March and again on 14 April.  There was another flight on 7 April, but that history did not include the final approach.

In addition to PK-LOO, the airplane landing just ahead, flight IW1193, can also be tracked as a reference to any environmental effects (wind shears) that might be emerging.

It is apparent PK-LOO joined the final approach very, very late.

PK-LOO appears to have joined final approach to runway 27 about 4000 feet from the runway threshold.

PK-LOO appears to have joined the final approach about 27 seconds from crossing the runway 27 threshold.

Looking at the vertical profile, it is apparent that PK-LOO was a bit higher than earlier approaches on short final, and appears to have pitched over a bit too much, and ended 25 to 75 feet below prior approach paths.

The final approach ground speed was about 10 knots faster than earlier approaches, which may have been do to other factors (gross weight, wind).  Ground speed was relatively stable.

PK-LOO arrived at the runway with its path aligned a bit to the right of centerline. 

It appears a correction was made just short of the runway threshold that left the airplane heading a bit to the left of the the centerline.

Reports have PK-LOO departing the left side of runway 27 and thankfully no injuries.

Stay tuned,

Peter Lemme

peter @
Follow me on twitter: @Satcom_Guru
Copyright 2018 All Rights Reserved

Peter Lemme has been a leader in avionics engineering for 35 years. He offers independent consulting services largely focused on avionics and L, Ku, and Ka band satellite communications to aircraft. Peter chairs the SAE-ITC AEEC Ku/Ka-band satcom subcommittee, developing ARINC 791 and 792 characteristics and contributes to the Network Infrastructure and Interfaces (NIS) subcommittee developing Project Paper 848, standard for Media Independent Secure Offboard Network.

Peter was Boeing avionics supervisor for 767 and 747-400 data link recording, data link reporting, and satellite communications. He was an FAA designated engineering representative (DER) for ACARS, satellite communications, DFDAU, DFDR, ACMS and printers. Peter was lead engineer for Thrust Management System (757, 767, 747-400), also supervisor for satellite communications for 777, and was manager of terminal-area projects (GLS, MLS, enhanced vision).

An instrument-rated private pilot, single engine land and sea, Peter has enjoyed perspectives from both operating and designing airplanes. Hundreds of hours of flight test analysis and thousands of hours in simulators have given him an appreciation for the many aspects that drive aviation; whether tandem complexity, policy, human, or technical; and the difficulties and challenges to achieving success.

No comments:

Post a Comment