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Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
Odds the sensors were deactivated since 'it's not a door anymore', and it was put on incorrectly?
Looks like that was likely the case. It's still a plug style door so it should not be able to open with pressure on it. Based on the AD that came out, they are looking for missing deactivation bolts and rods. These make sure the door can't be opened, but the door still shouldn't open itself without these considering they aren't installed on any aircraft where this door is activated. The bolts just provide the equivalent level of safety needed to deactivate the sensors.

Also video of the door opening normally.
 

Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
That door is exactly the same in the 737-900, circa 2004. It is required as an emergency exit in high density seating.
It is old tried and true tech, but the assembly line and inspection screwed up.
There is a possibility Alaska opened it and/or checked it during their conformity checks, not really sure if that would be part of that or not.
 
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Exterous

Super Moderator
Jun 20, 2006
20,425
3,530
126
That door is exactly the same in the 737-900, circa 2004. It is required as an emergency exit in high density seating.
It is old tried and true tech, but the assembly line and inspection screwed up.
And when you think of the number of miles flown by the rather large fleet that uses this design it's a pretty sound design. Some speculation on flyertalk that a contractor who has already been troublesome might be to blame
 
Reactions: hal2kilo

Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
there are more than a few bodies of water out there and it will sink.
They found the door. A teacher found it last night in her back yard. She is very lucky it didn't go through her roof.
 

iRONic

Diamond Member
Jan 28, 2006
7,097
2,405
136
Ohman… freshly delivered aircraft with mx write ups on the plug?!?! Article intimates the lights were MEL’d for over water ops… No bueno!
 
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Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
Ohman… freshly delivered aircraft with mx write ups on the plug?!?! Article intimates the lights were MEL’d for over water ops… No bueno!
They didn't say the light was MEL'd they said that mx cleared the error and returned the aircraft to service. Sounds like their repeat control group flagged the repeat error, scheduled it for more in-depth checks and added the no-ETOPS restriction.

It does look like there is an MEL for it in the MMEL, though, if they wanted to use one. IIRC, the light shows a problem with the controller, since the fault cleared when they changed controllers, it might be completely unrelated.
 
Reactions: iRONic

Drach

Golden Member
Apr 24, 2022
1,099
1,740
106
ETOPS used to stand for Extended Twin-Engine Operations, and now is Extended Operations. Originally, it was a certification that permitted twin engine aircraft to fly routes which may, at the time, be greater than 60 minutes flying time from the nearest airport that is suitable for an emergency landing.
A minimum equipment list (MEL) is a list which provides for the operation of aircraft, subject to specified conditions, with particular equipment inoperative (which is) prepared by an operator in conformity with, or more restrictive than, the MMEL established for the aircraft type.


A minimum equipment list (MEL) is a list which provides for the operation of aircraft, subject to specified conditions, with particular equipment inoperative (which is) prepared by an operator in conformity with, or more restrictive than, the MMEL established for the aircraft type.


The master minimum equipment list (MMEL) is a list established for a particular aircraft type by the organisation responsible for the type design with the approval of the State of Design which identifies items which individually may be unserviceable at the commencement of a flight. The MMEL may be associated with special operating conditions, limitations or procedures.
 

Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
ETOPS used to stand for Extended Twin-Engine Operations, and now is Extended Operations. Originally, it was a certification that permitted twin engine aircraft to fly routes which may, at the time, be greater than 60 minutes flying time from the nearest airport that is suitable for an emergency landing.
A minimum equipment list (MEL) is a list which provides for the operation of aircraft, subject to specified conditions, with particular equipment inoperative (which is) prepared by an operator in conformity with, or more restrictive than, the MMEL established for the aircraft type.


A minimum equipment list (MEL) is a list which provides for the operation of aircraft, subject to specified conditions, with particular equipment inoperative (which is) prepared by an operator in conformity with, or more restrictive than, the MMEL established for the aircraft type.


The master minimum equipment list (MMEL) is a list established for a particular aircraft type by the organisation responsible for the type design with the approval of the State of Design which identifies items which individually may be unserviceable at the commencement of a flight. The MMEL may be associated with special operating conditions, limitations or procedures.
I'll add the MMEL (Master list) is a public document owned by the FAA so it can be found by searching for "737 MMEL." Alaska's specific MEL is a private document that is approved by the FAA.
 
Reactions: iRONic

Zorba

Lifer
Oct 22, 1999
14,788
10,212
136
Sounds to me like someone took the easy way out of something.
Without the minimum equipment lists (MEL), if a reading light on seat 36E burned out, the aircraft couldn't take off until it was replaced. The MEL allows them to fix the light within 10 days and go for now. Literally nothing on an airplane can be broken or not working without some sort of authorization, the MEL being the most common. The MEL is based on the safety design of the aircraft and takes redundancy into account. It also provides any additional inspections or operational restrictions required to operate with that item not working.

MELs can be abused, but the FAA and pilots come down hard on this. My old operator lost their ability to MEL the aux power units on some fleets because they were being used too often.

Try googling MEL or even m.e.l. It starts with the Michigan Electronic Library, then moves on to Mel Gibson and Mel Brooks.
Sorry, I'll try to spell them out in the future.
 

iRONic

Diamond Member
Jan 28, 2006
7,097
2,405
136
I can only correct you on one thing, Zorba. FAA doesn't “approve" your MEL or your operating certificate, ie Part 91, 135, or 121. They “accept” it.

I’ve written, submitted, and had accepted at least four over my career. I’ve been retired for about 11 years now but I can't imagine that part of the FARs have changed.
 
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Drach

Golden Member
Apr 24, 2022
1,099
1,740
106
Without the minimum equipment lists (MEL), if a reading light on seat 36E burned out, the aircraft couldn't take off until it was replaced. The MEL allows them to fix the light within 10 days and go for now. Literally nothing on an airplane can be broken or not working without some sort of authorization, the MEL being the most common. The MEL is based on the safety design of the aircraft and takes redundancy into account. It also provides any additional inspections or operational restrictions required to operate with that item not working.

MELs can be abused, but the FAA and pilots come down hard on this. My old operator lost their ability to MEL the aux power units on some fleets because they were being used too often.


Sorry, I'll try to spell them out in the future.
TY
 
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