Originally Posted by
AGBagb
The Preliminary Report (78 pages)
linked to above is a
very slow download this morning. And many press reports of it are - imho - based on the press releases accompanying it, not the text itself. So, here's the
Synopsis section of the English version of the original document (p. vii), followed by the
Safety Recommendations (p.27). .......
4 SAFETY RECOMMENDATIONS
The KNKT acknowledges the safety actions taken by Lion Air and considered that the safety actions were relevant to improve safety, however there still safety issue remain to be considered. Therefore, the KNKT issued safety recommendations to address safety issues identified in this report.
4.1 Lion Air Lion AirLion Air
04.O-2018-35.1
Refer to the CASR Part 91.7 Civil Aircraft Airworthiness and the Operation Manual part A subchapter 1.4.2,
the pilot in command shall discontinue the flight when un-airworthy mechanical, electrical, or structural conditions occur.
The flight from Denpasar to Jakarta experienced stick shaker activation during the takeoff rotation and remained active throughout the flight. This condition is considered as un-airworthy condition and the flight shall not be continued.
KNKT recommend ensuring the implementation of the Operation Manual part A subchapter 1.4.2 in order to improve the safety culture and to enable the pilot to make proper decision to continue the flight.
.......
What a strange recommendation. Leaving aside the fact that this aircraft flew multiple sectors with similar defects and whether this should have resulted in diversions or not, how can any pilot make a proper decision to continue on a flight based on this guidance? As the flight crew cannot measure 'airworthiness', then any mechanical, electrical or structural condition on the aircraft will lead to a diversion. Genny tripped off? => divert; lightning strike? => divert; UAS? => divert
Surely that is what the QRH is for - if it tells the crew to 'land as soon as possible' then Boeing consider the airworthiness is at stake. If the QRH leads to the condition being manageable, then why question the airworthiness?