Forum: F-16 News

The motor is stuck in SEC or MAIN POWER switch was shut off too soon upon shutdown

AN AB inhibit problem should not keep nozzles closed ... If it does, I'm Voting for Pratt's

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VarkVet wrote:

The motor is stuck in SEC or MAIN POWER switch was shut off too soon upon shutdown

AN AB inhibit problem should not keep nozzles closed ...

Like I said earlier. It was the servo cartridge that clogged up. It kicks out the hyd pump servo fault along with the aug inhibit. That tiny cartridge, if clogged, will cause the pump to close the nozzle. If you are in aug at the time when a hyd pump servo fault kicks out, it will throw out the aug inhibit fault. It is our jet, I know why it was out there. Duh...... Rolling Eyes

I still would choose a GE over a Pratt any day but I can't help it they decided to use and hydraulic pump instead of air. That CENC noise gets annoying though.

Mushmouth wrote:

VarkVet wrote:

The motor is stuck in SEC or MAIN POWER switch was shut off too soon upon shutdown

AN AB inhibit problem should not keep nozzles closed ...

Like I said earlier. It was the servo cartridge that clogged up. It kicks out the hyd pump servo fault along with the aug inhibit. That tiny cartridge, if clogged, will cause the pump to close the nozzle. If you are in aug at the time when a hyd pump servo fault kicks out, it will throw out the aug inhibit fault. It is our jet, I know why it was out there. Duh...... Rolling Eyes

I still would choose a GE over a Pratt any day but I can't help it they decided to use and hydraulic pump instead of air. That CENC noise gets annoying though.

So when this cartridge gets clogged and the nozzle is pumped closed, the only indication is a couple of PFLS and nozzle indication? The SEC light does not come on?

I’m new to the GE and your post is most informative … modern technology never fails to amaze me.

Thanks

Correct. When the cartridge gets clogged, it's just like the servo signal is partially lost, and it will automatically close the nozzle. The engine will still run in primary mode with no problem, it will never go into SEC, but if you were to try to go into burner, it would kick out a AB INHIBIT fault letting you know that it is not possible at the time. It's just an internal back-up feature the pump has. We a had a few pilots that were flying that didn't even know that there nozzle was stuck closed since when you get a SEC light your Master Caution comes on, so it was never brought to there attention. They would hit the ground and realize it an call a IFE. ON THE GROUND!!! And you approach them like, "Are you serious??"

I would be glad to provide you on any futher info on freaky problem.

Mush

19 August 2008:
Two F-16.
USAF, based at Misawa AB, Aomori Prefecture.
15:40, during usual traning, emergency landed at Hachinohe JMSDF AB.

Civilian flight was using Misawa AP as usual, but USAF explained could not use the AP. Real reason unknown.

http://headlines.yahoo.co.jp/hl?a=20080 ... -mailo-l02

Gamera wrote:

19 August 2008:
Two F-16.
USAF, based at Misawa AB, Aomori Prefecture.
15:40, during usual traning, emergency landed at Hachinohe JMSDF AB.

Civilian flight was using Misawa AP as usual, but USAF explained could not use the AP. Real reason unknown.

http://headlines.yahoo.co.jp/hl?a=20080 ... -mailo-l02

You refering to a different incident? And that link is unreadable.

Different incident. And that news link works from my end; just checked.

Cool.

*UPDATE*

19 August 2008:
Two F-16.
USAF, based at Misawa AB, Aomori Prefecture.
15:40, during usual traning, emergency landed at Hachinohe JMSDF AB.

Civilian flight was using Misawa AP as usual.

According to Misawa AB, aircraft emergency stop wire on runway malfunctioned, and temporarily could not use runway. Soon repaired. Affected only these two F-16.

http://www.nikkansports.com/general/new ... 98722.html
http://headlines.yahoo.co.jp/hl?a=20080 ... -mailo-l02
http://mainichi.jp/area/aomori/news/200 ... 8000c.html

26 April 2010:
F-16. WW [?]-695 or [?]-895. [Probably F-16C Block 50P, 92-3895.]
[Probably 13th FS,] USAF, based at Misawa AB, Aomori Prefecture.
15:57 and 16:02, two F-16 emergency landed at Aomori AP. One F-16 had engine trouble.

Pilot was not wounded.

Sixth US military aircraft emergency landing at Aomori, since a F-16 in 2004 August.

Two of flight of seven.
15:51, during training, 50 km northwest of Aomori AP, engine trouble warning light, and requested emergency landing at Aomori AP. Before landing, loitered in landing course, 1,500 m southwest of Aomori AP.
After landing, because checked runway, civil flight from Toukyou, ETA 16:10, delayed 17 minutes.

http://www.f-16.net/aircraft-database/F ... file/3788/
http://www.toonippo.co.jp/news_too/nto2 ... 223645.asp
http://www.toonippo.co.jp/news_too/nto2 ... 173730.asp

20 April 2010:
Three F-16.
USAF, based at Misawa AB, Aomori Prefecture.
14:35 and 14:45, emergency landed at Hachinohe JMSDF AB. Fog at Misawa AB.

http://www.toonippo.co.jp/news_too/nto2 ... 094600.asp

http://www.toonippo.co.jp/news_too/nto2 ... 125054.asp
http://www.toonippo.co.jp/news_too/nto2 ... 092204.asp

2010.04.28:
After 8:00, one of two F-16 refuelled.
9:51, refuelled F-16 took off. Returned to Misawa AB.

Accident F-16 [92-3895] confirmed engine trouble.
After 14:00, mechanics dismounted engine from aircraft, to repair.

http://www.toonippo.co.jp/news_too/nto2 ... 110111.asp

Photo of accident aircraft tail code.

http://www.toonippo.co.jp/news_too/nto2 ... 131529.asp

2010.05.08:
Colonel John Pierce of 35th FW, USAF, apologises to Aomori AP management, for the USAF F-16 with engine trouble [and missiles!], over-staying at Aomori AP, Aomori Prefecture. May 7 is 12th day.
April 30 to May 3, engine replacement delayed by bad weather. Then, delayed by lack of spare parts.
Work resumes on May 7 afternoon.
Aomori AP demands landing and parking fees. According to Japan-USA agreement, USAF does not pay. JMOD pays.

(At a civilian airport, this F-16 is armed with missiles! Fun.) XD

10 January 2011:
Three F-16.
USAF, based at Misawa AB, Aomori Prefecture.
19:50, emergency landed at Hachinohe JMSDF AB, Aomori Prefecture.
Bad weather.

11 January, morning, departed Hachinohe.

http://big5.xinhuanet.com/gate/big5/new ... 970087.htm

16 June 2011:
F-16.
USAF, based at Misawa AB, Aomori Prefectue.
11:30, diverted, and landed at Hachinohe AB, Aomori Prefectue.
Aircraft not damaged.
Pilot not wounded.

Another F-16 earlier landed at Misawa AB, tire punctured, and Misawa AB runway closed.

http://sankei.jp.msn.com/region/news/11 ... 004-n1.htm

http://sankei.jp.msn.com/affairs/news/1 ... 016-n1.htm

6 August 2011:
Three F-16.
USAF, based at Misawa AB, Aomori Prefecture.
16:00, emergency landed at Hachinohe JMSDF AB, Aomori Prefecture.

17:48, one departed.
17:52, another departed.
Third scheduled to depart on 7 August.
Accident cause investigating.

http://www.toonippo.co.jp/news_too/nto2 ... 095624.asp

Forum: F-16 News

USAF F-16s make emergency landing at Fukuoka, Japan