Tough B737-800 question
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Joined: Jul 2006
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From: Norway
Tough B737-800 question
Hello
Here is a tough B737-800 question:
When one experiences a sudden N1 seizure one looses the minimum and maximum buffet onset tapes on the associated onside speedbar and is given a 'SPD LIM' indication beneath the speedbar. Then, if one sets the engine start switches to 'cont', one gains them back.
Why is this?
The EEC alternator shuts down if N2 drops below 15% and is coupled to the transfer bus when the switch is set to 'cont'. But then I can't see why that should be applicable. The buffet onset tapes collect information on weight from the FMC and speed and AoA from the ADIRU and computes it in the SMYD before sending the information to the DEU.
How can a U/S EEC affect this?
A definitive answer would be of great interest
Here is a tough B737-800 question:
When one experiences a sudden N1 seizure one looses the minimum and maximum buffet onset tapes on the associated onside speedbar and is given a 'SPD LIM' indication beneath the speedbar. Then, if one sets the engine start switches to 'cont', one gains them back.
Why is this?
The EEC alternator shuts down if N2 drops below 15% and is coupled to the transfer bus when the switch is set to 'cont'. But then I can't see why that should be applicable. The buffet onset tapes collect information on weight from the FMC and speed and AoA from the ADIRU and computes it in the SMYD before sending the information to the DEU.
How can a U/S EEC affect this?
A definitive answer would be of great interest
