Feb 26 2013

Smoke in cockpit after electrical incident F-35B

Gepubliceerd door JSFNieuws.nl om 20:57 onder Global F35 News

Reuters reported today a previouysly unreported incident with the F-35B prototype BF-2.

Kyra Hawn, the spokeswoman for the JSF Program Office said in a reaction to Reuters, that an there had been an incident involving a F-35B (prototype) BF-2 on February 14, 2013.
There was smoke (but no fire) in the cockpit a problem detected within the power thermal management system (Kyra Hawn: the smoke in the cockpit was a software issue, not a hardware issue with the auxiliary power unit).

Integrated Power Pack/temperature control unit

The CBNC article: “Honeywell said it would inspect the system, which manages the distribution of hot and cold air in the F-35 fuselage, once it arrived at the company’s Phoenix testing facility.” (complete system is send to Honeywell; because the software code generates smoke, a novel). The will inspect the system and develop a permanent fix. Only the temperature control system (part of the total Integrated Power Pack system) was being sent back to Honeywell.
The Honeywell IPP is a unique system that combines the normal functions of a back-up generator, APU/starter, emergency power unit and the air cycle machine (ACM) that runs the environmental control system. Clear explanation in “Talking about my generators”. (Aviation Week; March-2011)

JPO/Lockheed Martin: “No lithium-ion battery problem with F-35”

Honeywell is the manufacturer of the F-35 “power thermal management system,” which uses a (Saft) lithium-ion battery. The battery technology (not the producer) is similar to those whose failures have grounded the entire fleet of Boeing 787 Dreamliners.

Kyra Hawn emphasized: “It has no linkage whatsoever with the lithium-ion batteries.”

Also Lockheed spokesman Michael Rein said to the press: “There is no evidence that the lithium ion batteries are a contributor to this event, no battery faults were observed at any time.”

Other IPP incidents:

July 2008: On 23-Jul-2008, both flying F-35 prototypes were grounded after problems were detected with ground cooling fan electrical circuitry, US DCMA reported 18-Aug-2008 that test were delayed as a result of testing anomalies on the 28 Volt and 270 Volt Battery Charger/Controller Unit, the Electrical Distribution Unit and the Power Distribution Unit.
It was an issue due to design problems. Flights were resumed first week of September-2008.

August 2011: A precautionary grounding of all 20 F-35’s that had reached flying status was ordered 3-Aug-2011 after a valve in the Integrated Power Package (IPP) of F-35A test aircraft AF-4 failed. On 18 August 2011 the flight ban was lifted to allow monitored operations.
A permanent resolution would be installed later.

Source:
CBNC (Reuters); 25-feb-2013; Honeywell to test some F-35 parts after smoke incident

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