Loose Bolts Grounded Ospreys; Fix Underway

Loose Bolts Grounded Ospreys; Fix Underway

All 84 Ospreys were temporarily grounded following the discovery March 21 of four loose bolts in a V-22 in Iraq.

“This is a temporary grounding bulletin issued strictly as a precautionary measure,” NavAir’s V-22 spokesman Mike Welding said Tuesday evening.

“If one of those came lose in flight, the worst case scenario you would lose control of the affected prop rotor,” he said, adding that no planes had been affected in flight. “Our priority first and foremost is safety.”

Four planes have had problems with the bolts, which help control the prop rotors. Two of those planes are back in the air, Welding said. The repairs take two days, he said.

All the affected planes are in Iraq, he said, adding that the cause of the loose bolts is not entirely clear yet and investigations are proceeding to figure out why they came loose.

The Marines expect the “red stripe” notice “ issued on March 23 to have a minimal impact on operations,” said Maj. Eric Dent, a Marine spokesman in Washington. Although all 84 Ospreys are being checked, the inspection takes roughly two hours, Dent said, so most planes should be back in the air pretty quickly.

Welding said that as of Tuesday evening 62 planes had been checked so far. The hope is that all the planes will be back in duty by Wednesday, he said.

New procedures are being put in place to make sure the problem does not recur, Welding said.

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Sense Lock washers can’t be used in a lot of the areas on any aircraft. There are casalated nuts with cotter keys???. and self locking nuts that are great. So apparently some one failed to propertly torque the said nuts. Where was the Quialty control. or technical inspector at???.

Did this grounding affect only USMC Ospreys or USAF too?

George,

It affected all Ospreys.

How about bolts and nuts that you can safety wire?

Loose bolts can be attributed to a variety of causes –and they ARE ALWAYS a MAJOR concern for those inspecting/assembling and checking!
This problem HAS occurred before several times and places including NASA items! Incorrect machined screw threads a very serious art and science by the way, incorrectly measured/inspected threads, incorrectly marked/stamped identified type/grade of bolts, incorrectly assembled/stripped/damaged bolts, ..
Lockwire is also an art and science– a technique if you will — If it is not done properly it will NOT prevent bolts from loosening it may prevent them from becoming fully disengaged and free flying loose but that depends on how well it is done and quality of lockwire itself. Many tried and true military specifications for these items have been superceded,cancelled replaced by not so strict commercial specifications.

The V-22 since the beginning has been haunted with crashes and death. The services tried to kill this program in the 80’s but it got shoved up their _ _ _ by Congress. They need to go away or sell them to a third world country.

Working on aircraft engines for 11 years in the military, we always used safety wiring for bolts and nuts. Why was these bolts not safety-wired?

I WORK ON THE V-22 AT PAXS RIVER THAT ROTOR PROP IS A BIG PAIN IN THE ASS TO WORK ON.THERE IS NO ROOM TO DO ANYING NOT .YOU CANT SAFTEY WIRE ANY BOLTS ON . JUST THE CLAMP SET AS SAFTEY BOLTS.

Mr.Saunders needs to check his facts. The Marine Corps, Navy, and Airforce have all supported the Osprey from the start. The Army was an initial supporter but backed out in favor of more money for H60’s. I suppose he wants to get rid of the F22 now that it killed a test pilot!

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