The FIELD AVIATION APU removal STC for the DHC-8 provides the operator with a procedure for removing the OEM Installed Hamilton Sundstrand T-62T-40C7B Auxiliary Power Unit.

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Replace 30E94-2 Sensing Element in Janitrol Valve 45E04-1 used on DHC-8 Oil Coolers 28E99-6 and 28E99-7 in accordance with Honeywell LORI Specification LR 0201-117 as reflected on Honeywell LORI Sealed Drawing List SDL3709-1, Revision A, dated 11 October 2005 or later FAA approved revision.

Replace core assembly of Janitrol Engine Oil Cooler, part number 28E99-3, -4, -6, and -7

Installation of a Sundstrand Turbomach T-62T-40C7B gas turbine auxiliary power unit with a Lear Siegler Model 23088-002 DC starter-generator.

De-Icer Boot Installation
Limitations: Installation of Aerazur Type 51 De-Ice Boots in accordance with Fields Aviation Company inc. Drawing List No. 33644; Issue 2Instructions for Continued Airworthiness Maintenance must be done in accordance with Fields Aviation Company inc.Maintenance Man (...)
Conditions: None.

Retrofit of Honeywell 1152106-3 400 amp APU Starter Generator and Honeywell 1152108-6 Generator Control Unit.

Installation and maintenance of Aerazur Engine Inlet De-Icer Boot.

Installation of Pratt & Whitney Engine Services, Inc. Data Transmission Unit (DTU).

Installation of Pratt & Whitney Engine Services, Inc. Digital Aircraft Data Acquisition System ADASd.

Installation of exhaust outlet.