Page 40 - Volume 10 Number 9

Technically...
Service Bulletins Issued: August 2016
Compliance – Recommended: This Service Bulletin should be accomplished at a scheduled maintenance period or inspection.
NOTE: This Service Bulletin may be completed at a time when Left and Right Passenger Compartment Cabin Window Panels are removed to facilitate other maintenance such as at the first Cross Tie Inspection at 2500 cycles.
A service bulletin published by Textron Aviation may be recorded as completed in an aircraft log only when the following requirements are satisfied:
1) The mechanic must complete all of the instructions in the service bulletin, including the intent therein.
2) The mechanic must correctly use and install all applicable parts supplied with the service bulletin kit. Only with written authorization from Textron Aviation can substitute parts or rebuilt parts be used to replace new parts.
3) The mechanic or airplane owner must use the technical data in the service bulletin only as approved and published.
4) The mechanic or airplane owner must apply the information in the service bulletin only to aircraft serial numbers identified in the Effectivity section of the bulletin.
5) The mechanic or airplane owner must use maintenance practices that are identified as acceptable standard practices in the aviation industry and governmental regulations.
No individual or corporate organization other than Textron Aviation is authorized to make or apply any changes to a Textron Aviation-issued service bulletin, service letter, or flight manual supplement without prior written consent from Textron Aviation.
Textron Aviation is not responsible for the quality of maintenance performed to comply with this document, unless the maintenance is accomplished at a Textron Aviation-owned Service Center.
RECENT SERVICE BULLETINS,
ADVISORY DIRECTIVES AND SAFETY
COMMUNICATIONS
Effectivity: Beechcraft Super King Air B300/B300C Fusion, Serial Numbers FL-1032 through FL-1041, FL- 1043, FL-1049, FL-1053 through FL-1055 and FL-1057.
The equivalent of this Service Bulletin has been incorporated on production airplanes FL-1058 and on.
Reason: This Service Bulletin is being issued to inspect for missing distribution duct plugs to ensure installation meets type design and to ensure adequate air flow distribution.
Description: This Service Bulletin provides parts and instructions to inspect for and if necessary install 300-1184-1 upper duct plugs at FS 156.00.
Warranty: Eligible airplanes may qualify for parts and labor coverage to the extent noted in the Labor Hours and Material Availability sections of this document. (Editor’s Note: Full service bulletin can be found on company website).
From King Air Communiqué 2016-08:
Issued: July 2016
ATA 30 – Prop Heat Operational Check Procedure - Engines Not Running
BY-122, BY-124 and after; BZ-1 and after
King Air Communiqué 2015-07 was issued to remind owner/operators not to operate the propeller heat when the engines are not running. This action helps to prevent damage to the propeller blades and de-ice boot. The propeller manufacturer has also placed a 10-second limitation on operating the propeller heat with the engines not running. This limit creates an issue when performing a propeller heat test because the timer in the propeller de-ice system cycles the power to the left and right propeller every 90 seconds. This condition makes it impossible to assure that the propeller heat system is operating correctly while the airplane is in the hangar. The system can still be tested during ground runs with the engines running. The following paragraph provides a procedure that tests the system without applying power to the boots.
Propeller De-ice Boot Continuity Check: Check the resistance of each de-ice boot by disconnecting the boot and testing it individually. Continuity through the slip rings can be measured with the boots connected by disconnecting the brush block and measuring the resistance between the
Service Bulletin 21­4165: Air Conditioning – Duct Plug Inspection
38 • KING AIR MAGAZINE
SEPTEMBER 2016