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The Air Force Grounded Hundreds of Jets Because Their Tails May Fall Off
Popular Mechanics ^ | 1 March 2023 | Sébastien Roblin

Posted on 03/01/2023 11:31:51 AM PST by Alas Babylon!

Something was off with a key component used to literally hold many U.S. Air Force aircraft together—and it resulted in the service grounding 207 vital aircraft according to a Time Compliance Technical Order issues in February.

No—it’s wasn’t the Air Force’s numerous F-16 tactical fighters. Nor its new F-35 stealth jets, or venerable B-52 bombers and A-10 ground attack jets.

Foremost, it was the workhorse keeping all of those planes refueled in the sky: the service’s airliner-based KC-135 Stratotanker. It also affected RC-135 and WC-135 surveillance aircraft extensively deployed to monitor the activity and technologies of foreign militaries (particularly China, North Korea, and Russia).

The offending items, first publicly revealed on February 9 in a memo posted onto an unofficial Facebook page associated with Air Force non-commissioned officers, are apparently “non-conforming” vertical pins. Two of these 5-inch pins are used to bear 90 percent of the load fixing the vertical stabilizer (ie. tail fin) on the C-135 family of aircraft. The failure of just one pin therefore would suffice to compromise its load-bearing capacity, causing the entire vertical stabilizer to... “depart the aircraft,” as the memo dryly puts it.

According to the memo, a metallurgical analysis of two “non-conformal pins” supplied by BlueDog Industries found flaws including “incorrect material, undersized dimensions, insufficient plating and lack of shot peening.” All 280 pins were recalled by the Air Force, but unfortunately, some had already been installed.


TOPICS:
KEYWORDS: 800billionperyear; aviation; boeing707; kc135; military; usaf
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To: FtrPilot

“I don’t know what the problem is...here’s a picture of a B-52 that lost its tail:”

Maybe flying too close to a low lying bridge?


21 posted on 03/01/2023 12:26:26 PM PST by egfowler3 (Kung Flu, today's Hypochondriacal psychosis (aka: Delusional parasitosis))
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To: Steve_Seattle

The Jimmy Stewart movie was No Highway in the Sky. Very good movie.


22 posted on 03/01/2023 12:26:59 PM PST by garyb (What if you can't trust the voice in your head?)
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To: one guy in new jersey
Reminds me of the old Front Fell Off skit by Clarke and Dawe.
23 posted on 03/01/2023 12:38:54 PM PST by tenger (If we don't stay on 'em, they'll get it wrong. -Joe Soucheray)
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To: markomalley; DYngbld; TADSLOS; xsrdx; big'ol_freeper; Mark17; mikefive; JDoutrider; ...

Ping.


24 posted on 03/01/2023 12:39:41 PM PST by Jet Jaguar
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To: Alas Babylon!
> ... the entire vertical stabilizer to “depart the aircraft,” ...

"Elvis has left the building."

25 posted on 03/01/2023 12:45:51 PM PST by dayglored (Strange Women Lying In Ponds Distributing Swords! Arthur Pendragon in 2024)
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To: Alas Babylon!

That reminds me of this:
Clarke and Dawe-”The Front Fell Off”
https://www.youtube.com/watch?v=3m5qxZm_JqM


26 posted on 03/01/2023 12:48:41 PM PST by Repeal The 17th (Get out of the matrix and get a real life.)
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To: tenger

you beat me to it.


27 posted on 03/01/2023 12:49:40 PM PST by Repeal The 17th (Get out of the matrix and get a real life.)
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To: cld51860

My gf works at Fairchild AFB — 92nd Air Refueling Wing.


28 posted on 03/01/2023 12:52:54 PM PST by steve86 (Numquam accusatus, numquam ad curiam ibit, numquam ad carcerem™)
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To: garyb

Yes, that’s it. Thanks.


29 posted on 03/01/2023 12:57:30 PM PST by Steve_Seattle
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To: Alas Babylon!

Interesting, usually it’s the US Navy that has this problem


30 posted on 03/01/2023 12:59:00 PM PST by dila813
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To: egfowler3
The flight was a fully instrumented test flight to determine how well the aircraft handled turbulence. I guess they got more than they bargained for.

Originally, the B-52 had a very tall tail, as shown here:

Later versions had the tail shortened, as shown here:


31 posted on 03/01/2023 1:03:39 PM PST by FtrPilot
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To: Alas Babylon!

I work at a tanker squadron, and yes, this report is real. Many of our planes are being grounded except for a one way trip to Oklahoma to get the pins replaced.


32 posted on 03/01/2023 1:11:04 PM PST by ducttape45 (Proverbs 14:34, "Righteousness exalteth a nation: but sin is a reproach to any people.")
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To: Rowdyone

Nope, they will be replaced with the KC-46.


33 posted on 03/01/2023 1:12:22 PM PST by ducttape45 (Proverbs 14:34, "Righteousness exalteth a nation: but sin is a reproach to any people.")
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To: Alas Babylon!

By the end of talyObidens regime our military will be down to rocks and carrier pigeons with diahreah.


34 posted on 03/01/2023 1:15:05 PM PST by cuz1961 (USCGR Veteran )
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To: Alas Babylon!

Where’s Jimmy Stewart when you need him?

https://en.wikipedia.org/wiki/No_Highway_in_the_Sky


35 posted on 03/01/2023 1:31:13 PM PST by SJSAMPLE
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To: Alas Babylon!

....also have a number of hours as a passenger in various KC-135s....the last one I flew in just a few years ago had a 1957 federal fiscal year tail number....now, that’s gettin’ on in years...!!!


36 posted on 03/01/2023 1:35:19 PM PST by TokarevM57
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To: Rowdyone
Thought the KC-135’s were being phased out by the C-17’s.

The C-17 replaced the C-141B. They are cargo only aircraft while the KC-135R and the KC-46 are aerial refueling tankers.

37 posted on 03/01/2023 1:35:45 PM PST by OldMissileer (Atlas, Titan, Minuteman, PK. Winners of the Cold War)
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To: Steve_Seattle

I saw that movie. Good one. The geek wins and gets the girl too.


38 posted on 03/01/2023 1:50:31 PM PST by Justa (If where you came from is so great then why aren't Floridians moving there?)
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To: Alas Babylon!

Did the tail problems start when females were admitted to the AF Academy?


39 posted on 03/01/2023 2:13:05 PM PST by Scrambler Bob
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To: AlaskaErik

Man, those heater/blowers up top were red hot. And the deck felt below zero.

If there’s cardboard boxes of pallets, especially about chest-high, that’s the place to be.

Not hot above, not freezing below, but at about chest high both extremes neutralize each other.

I would often see crew put a sleeping bag on a pallet load and stretch out on it. Toasty, not too hot.


40 posted on 03/01/2023 2:22:52 PM PST by Alas Babylon! (Gov't declaring misinformation is tyranny: “Who determines what false information is?” )
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