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Beech Safety Communique

Beechcraft is issuing a safety communique to advise operators of Beechcraft and King Air models of reports of uncommanded yaw events during landing flare. The reports describe significant uncommanded yaw that was controlled by flight inputs. Beechcraft and Pratt & Whitney are investigating incidents involving PT-6 engines with ground idle solenoids and beta valves. Operators are advised to be aware of the potential for the condition to repeat and that Beechcraft will provide updates as the issue is investigated further.

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340 views1 page

Beech Safety Communique

Beechcraft is issuing a safety communique to advise operators of Beechcraft and King Air models of reports of uncommanded yaw events during landing flare. The reports describe significant uncommanded yaw that was controlled by flight inputs. Beechcraft and Pratt & Whitney are investigating incidents involving PT-6 engines with ground idle solenoids and beta valves. Operators are advised to be aware of the potential for the condition to repeat and that Beechcraft will provide updates as the issue is investigated further.

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Gee
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Safety Communiqué

June, 2015

TO: ALL OWNERS AND OPERATORS, CHIEF PILOTS, DIRECTORS OF


OPERATIONS, DIRECTORS OF MAINTENANCE, HAWKER BEECHCRAFT
SERVICES, AUTHORIZED SERVICE CENTER FACILITIES, AND
INTERNATIONAL DISTRIBUTORS AND DEALERS.

MODELS: BEECHCRAFT MODEL F90, ALL SERIALS;


MODEL 200 SERIES (U.S. MILITARY KING AIR MODELS EQUIPPED WITH
GROUND IDLE SOLENOIDS), ALL SERIALS;
MODEL 300 SERIES (KING AIR 300, 300LW, B300, B300C), ALL SERIALS;
MODEL 1900 SERIES AIRPLANES, ALL SERIALS.

SUBJECT: UNCOMMANDED YAW EVENTS

Beechcraft Corporation is issuing this Safety Communique to advise owner/operators/flight


crews of airplanes listed in the MODELS section of a potential safety condition related to
uncommanded yaw events during the flare portion of a normal landing.

Beechcraft Corporation has received uncommanded yaw event reports on the models listed
above. Beechcraft and Pratt and Whitney Canada (PWC) have investigated previous reports and
in some cases, corrected the issue by proper rigging of engine controls or replacement of the
primary governor. Events have occurred on airplanes with various engine types including certain
PWC PT-6A-42, PT-6A-60A, PT-6A-65, and PT-6A-67 Series engines with similar ground idle
solenoid/beta valve configurations.

The reports have described significant, uncommanded yaw events that were controlled by
appropriate flight control input. Beechcraft Corporation is issuing this Safety Communique to
advise owner/operators/flight crews of this condition and emphasize that there is a potential for
the condition to repeat itself.

Beechcraft Corporation and PWC will continue to investigate this condition to gather more
information concerning this issue. Additional information will be issued as appropriate. For
technical questions, please contact your local Beechcraft Field Service Representative or
Beechcraft Corporation Technical Support at 1-800-429-5372 or 1-316-676-3140.

Safety Communiqué No.343 1 of 1


The export of these commodities, technology or software are subject to the US Export Administration Regulations. Diversion contrary to U.S. law is prohibited. For guidance on
export control requirements, contact the Commerce Department’s Bureau of Export Administration at 202-482-4811 or at www.bxa.doc.gov.

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