Originally Posted by
Prob30Tempo TSRA
Did it say why there was " no auto land "displayed , was it a switch pigs ?
As others have already mentioned, the localiser is offset from the runway heading, so autoland is not available. As for what caused the NO AUTOLAND message, the B777 AFDS monitors 30 or so parameters to determine the autoland status. NO AUTOLAND can result from a downgrade of the status from LAND 3 or LAND 2; or if neither LAND 3 nor LAND 2 is annunciated by 600 ft AGL. In this case the PF disengaged the autopilot at about 1,200 ft AGL to manually capture the glideslope and localiser. He then re-engaged the autopilot at a little over 600 ft AGL and was met with a NO AUTOLAND message. The message would have appeared because neither LAND 3 nor LAND 2 was annunciated by 600 ft AGL.
Originally Posted by
AQIS Boigu
Sounds like the crew threw away KL as a diversion option after the first go around
The report says the estimated fuel on landing at SIN was initially 7,000 kg, ie FRF plus about 45 mins. They might have scraped into KUL if they'd diverted immediately after being told to hold at PASPU, but the first go-around didn't occur until 50 minutes later, after they'd diverted to BTH. By that time they didn't have fuel to divert anywhere!
Originally Posted by
AQIS Boigu
Johor Bahru is also available just up the road - I wasn’t there but I just can’t imagine that all three airports had crap weather.
The report also says the two planned destination alternates were Paya Lebar and Senai (Johor Bahru). The crew indicated that, while holding at PASPU, the aircraft's weather radar showed heavy precipitation over Changi and both the alternates, while the weather appeared fine over Batam.