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Old 16th Dec 2022, 08:28
  #70 (permalink)  
GBO
 
Join Date: Mar 2008
Location: Australia
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Originally Posted by Icarus2001
If they turned for Penang as a result of a known failure they would have descended. No question.

if the aircraft was flying a new route they programmed as a diversion to Penang due an abnormal, then why did they have waypoints in the FMC beyond Penang?
The Captain of Helios 522 didn’t descend and he had a fault: “My cooling light is off”.
RIP Flight Attendant Andreas Prodromou

The diversion flown from IGARI to Penang was not in LNAV, as observed by primary radar.
It was flown manually or in heading mode on autopilot.
Without a L FMC, and no auto reversion to the R FMC, there is no active route, VNAV or Top Of Descent from IGARI to Penang.
Not until someone manually switches to the R FMC will a LNAV/VNAV route become possible.
This causes a software reset, which DELETES THE FLIGHT ID.
When the R FMC became available, someone programmed a diversion to Banda Aceh, hence the LNAV track observed on radar west of Penang through the Malacca Strait via VAMPI-MEKAR-NILAM.

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