From Multi-Engine Turboprop Communiqué # ME-TP-010

From Multi-Engine Turboprop Communiqué # ME-TP-010

Date: September 2018

ATA 5 – Phase 3 Inspection – Interior Removal Clarification

Communiqué 2008-02 and Communiqué 2011-03 were both written with good intent on the subject of, “do we need to remove the interior to perform the Phase 3 Inspection?”

This Communiqué will be the complete overall answer to this question.

Due to the inspection evolving, over time, the final answer is NO full interior removal is NOT required to complete the phase 3 inspection.

The reasoning behind the final answer can be found in its entirety under said above title in Communiqué # ME-TP-010.

ATA 31 – Fusion Equipped B350i King Air Phase 3 Production Update

Textron Aviation recently began deliveries of B350i Pro Line Fusion phase 3 aircraft. The serial effectivity for factory production is FL-1140 and after; and FM-76 and after. Phase 3 production aircraft will include the equipment changes and additional options shown below.

There are changes to software, databases, electronic activation keys and manuals with this release that should be noted. With the introduction of Phase 3, the Rockwell Collins Pilot’s Operating Guide 523-0824675; Pro Line Fusion Aircraft Maintenance Manual 523-0824677; FMS Quick Ref Guide 523-0823290; Fusion Quick Ref Guide 523-0822518 and Fault Isolation Manual 523-0824683. The list for production Phase 3 aircraft software is shown in this Communiqué online. The field loadable software files are available on the web site. The phase 3 AFD software is bundled into a load set as part number 434-310011-0011 file on the web site.

ATA 31 – Fusion Equipped King Air Adaptive Flight Display (AFD-3700) Service Bulletin

Rockwell Collins has released recommended service bulletin (SB) 3 for the AFD 3700s installed in Fusion equipped King Airs. Textron is recommending that operators have their AFDs modified with this SB at their earliest opportunity. Compliance with SB 3 upgrades the AFD’s firmware and is expected to greatly reduce occurrences of blanking or flickering screens and software corruption which can lead to “Config Do Not Takeoff” messages. For units under Collins 5-year warranty, Collins will install this SB at no charge for materials and labor. Once units fall out of warranty, the cost of installation will become the responsibility of the owner. Collins warranty coverage under this SB also expires May 31, 2022.

This SB was installed in Collins AFD production at serial number 4C093D and after. The cut in for Textron aircraft production installation of SB 3 AFDs was LJ-2140 and after; BY-302 and after; BZ-2 and after; FL-1106 and after; and FM-73 and after. If you have had an AFD replaced recently, any exchange AFDs from Collins would also have the SB complied with. If your AFD serial number is prior to the production cut in, you can verify your compliance by inspecting the AFD dataplate. If this SB has been complied with, MODS block 3 will be marked out as shown above. If your AFDs require this modification, please schedule them in advance through your service center as the current turn time is about 10 days once the AFD is received by Collins. Unscheduled requests for the modification could take longer if the back-log is high.

Major Components Utilized in
Phase 1 & 2 Aircraft


New Component in Phase 3

Audio Storage and Playback Unit(ASPU)

Audio Warning Generation


CSD 714

HF Selective Calling (SECAL)


Data Link Communications
Management Unit (CMU)

Manages 3rd VHF receiver for datalink functions


TW 950 TAWS+ Computer

Terrain awareness and warnings

iTAWS Application in AFD 3700

RTA 852 Weather radar

On board
weather radar

RTA-4112 MultiScan
Weather Radar**

IMS 3500+

updates and
flight plan loading

IMS 3500 with Mobile

* Only one RIU will be installed per aircraft. RIU version will be determined by the options ordered. ** New Optional to become standard on later serials.
***New Option

ATA 34 – L-3 ACSS TAWS+ Computer Database Memory Limitation

We have been notified by Aviation Com-munications and Surveillance Systems (ACSS) that database size has grown significantly in recent years. The 9000000-85006 TAWS+ computer installed in many Pro Line 21 and Fusion equipped King Airs is nearing its memory capacity. The date or database revision cycle where the current memory limit will be reached has not yet been defined but after the release of database cycle 041 there will only be 1.1 MB of free memory remaining. When this limit is reached, you will no longer be able to update the databases in the TAWS+ unit. The system will still operate normally on the last database loaded, however new obstacles and airport data would not be up to date in the unit. This could cause false alerts and new obstacles would not be identified by the system. ACSS released optional service bulletin (SB) 9000000-34-6037 to upgrade the memory in fielded units from 128MB to 256MB and converts the unit to part number 9000000-85010. Textron has recently approved the new part number as a spares replacement allowing fielded aircraft to upgrade their units through ACSS and reinstall the new part number without the need of an additional kit or other approval. The spares notes should be added to the related model illustrated parts catalogs as future revisions are released. Please contact your local service center in advance for a quote and to coordinate the upgrade as the unit will have to be sent to ACSS for modification. The SB requests a minimum 2-week lead time to schedule units in for modification to avoid delays getting the unit returned.

The 9000000-85006 computer was factory installed in the following aircraft: LJ-1847; LJ-1853 through LJ-2128; BB-2001 and after; BL-152 through BL-171; BY-42, BY-58 through BY-276; BZ-1; FL-600 through FL-611, FL-613 through FL-617, FL-619 through FL-1080; FM-25 through FM-70.

ATA 52 – Cabin Door Upper Latch Hook and Pin Inspection


The King Air Inspection guide instructs to inspect the cabin door upper latch hook pin for wear and calls for a limit of 10% of the original thickness. The original thickness can be determined by measuring the area where the hook does not contact the pin and make a comparison however for those that cannot accept this method, the original thickness of the pin is 0.25 inches.

The above technical publication information may be abbreviated for space purposes. For the entire document, go to

NOTE: As a convenience, service documents are now available online to all Textron Aviation customers through a simple, free-of-charge registra-tion process. If you would like to sign up, please visit the Customer Access link at to register.

About the Author

Leave a Reply