VOL. 23 - NO. 11
MAR 11 - 18, 2018
PO BOX 13283
OAKLAND, CA 94661-0283

510.595.7777 FAX

Joint Forces Journal is published privately, and in no way is connected with DoD, the U.S. Army, Navy, Air Force or Coast Guard. This website and the printed newspaper are intended for the members of the Armed Forces and their families. Contents do not necessarily reflect official views of the U.S. Government, the Department of Defense or the U.S. Army, Navy, Air Force or Coast Guard, and do not imply endorsements thereof. The marital status, physical handicap, political affiliation, or any other non-merit factor of the purchases, user or patron for advertisers prohibited. If a violation or rejection of this equal opportunity policy by an advertiser is confirmed, the publisher shall refuse to print advertising from that source until the violation is corrected. Editorial content is prepared and edited privately, and is provided by the Public Affairs Office of U.S. Army, Navy, Air Force and Coast Guard installations. Correspondence and material for publication should be addressed to: Editor, Joint Forces Journal, P.O. Box 13283, Oakland, CA, 94661-0283. Deadline for receiving articles and photos is 3 p.m. Monday for publication on Friday of that week. Joint Forces Journal editorial policy is to use bylines and photo credits where applicable and when submitted.

T-6 Trainers Restart Flights after Rash of Unexplained Pilot Symptoms

Mar 09, 2018
by Oriana Pawlyk
The Air Force has lifted its operational pause for T-6 Texan II trainer aircraft after a number of pilots at several bases in recent times experienced unexplained physiological events [UPEs] while in flight.

Maj. Gen. Patrick Doherty, 19th Air Force commander, ordered the end to the pause, with instructor pilots beginning flights first, then student pilots by the end of this week, according to a release from Air Education and Training Command.

Command officials said the cases described were not classical cases of hypoxia which is caused by oxygen deprivation. While pilots experienced similar symptoms in flight -- disorientation, shortness of breath, confusion, wheezing -- an obvious root cause has not been found.

"The operational pause was required to provide a robust and intrusive look at every component on every aircraft connected to or critical to the On-Board Oxygen Generating System," Doherty said.

Doherty said the OBOGS received crucial examination and testing after a team of experts from the Air Force, Navy, NASA and medical crew listened to pilots, maintainers, engineers and flight surgeons across the fleet.

Their descriptions led officials to believe the T-6 "was exhibiting symptoms indicative of a compromise of the integrity of the OBOGS, leading to degradations in performance, which then likely led to the pilots' physiological events," he said.

"As tests, inspections, and data were gathered, component failures or degradations were identified as affecting the topline performance of OBOGS oxygen pressure, flow, and content, resulting in various disruptions that negatively impacted the human-machine interface," Doherty added.

But flight engineers and flight surgeons will continue to further investigate to find a final root cause, he said.

The command ordered an indefinite operational pause for all T-6 aircraft at Columbus Air Force Base, Mississippi; Vance Air Force Base, Oklahoma; and Sheppard Air Force Base, Texas.

AETC leaders began testing a new, technical maintenance order to better evaluate the system, launching 24 flights of the T-6 to experiment with the procedures.

Before pilots could take to the air, a series of evaluations took place.

"The time change technical order allows you to go through and perform maintenance on it, so the system, the first change is checking the valve, the second will check the overall system looking for leaks, how's the system's overall performance," Lt. Gen Chris Nowland, the service's deputy chief of staff for operation, told reporters after a House Armed Services Committee on Air Force readiness.

Once in the air, teams in place began testing a backup method: Pilots disconnected from the OBOGS, flying at a restricted altitude.

The flights aimed to help "determine how's the system working, and what's the ambient air," or what a pilot experiences when he or she isn't connected to the system, Nowland said.

Pilots can breathe free-flowing air in the cockpit when flying under 10,000 feet, but need to hook up to an OBOGS above that altitude. If pilots experience hypoxia-like symptoms at lower altitudes, it could be an indication something else is erratic in the aircraft.

Lt. Gen. Steven Kwast, head of AETC, said during the recently held Air Force Association's Air Warfare Symposium that investigators had not found a reason to believe pilots were getting sick from breathing ambient air, a determination that indicates something faulty in the OBOGS.

Doherty said that more maintenance must be taken on the OBOGS, and that the 19th Air Force would implement "recurring inspections focusing on OBOGS components."

"With 30 years of flying experience, looking at all of the facts and listening to our experts, these particular types of T-6 UPEs aren't unexplained anymore in my mind," Doherty said.

"We have zeroed in on a handful of components that are degrading or failing to perform and needed to be replaced or repaired more often than the Air Force anticipated when they bought the aircraft," he said.

* * * * *

Photo caption: The T-6A Texan II is a single-engine, two-seat primary trainer designed to train Joint Primary Pilot Training, or JPPT, students in basic flying skills common to U.S. Air Force and Navy pilots. (U.S. Air Force/Master Sgt. David Richards)


Army Aims to Reach Readiness Goal by 2022, Then Shift to Modernization

Air Force Lifts Limits on Stadium Flyovers

Navy Wants to Use More Washington State Parks for Stealth SEAL Training

Marines Release Specifications for New Mega-Drone

“KITCHEN GOURMET” – Annie B’s, B.T. McElrath Chocolatier’s Tasty Treats More than Satisfy One’s Sweet Tooth

Coast Guard to Break Up Ice for Green Bay Fuel Shipments

TRAVEL & ENTERTAINMENT: Oakland Zoo’s Upcoming Events

TRAVEL & ENTERTAINMENT: Curran San Francisco Welcomes James Comey and Pete Souza as Part of “Curran: Show & Tell” Series

“KITCHEN GOURMET” – Daelmans Stroopwafels – Simply the Best in the World!

U.S., Allies Conduct Biggest Artillery Event in Europe Since Cold War

BOOK REVIEW: "Forty Things I Wish I'd Told My Kids" by John Allcock