UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED
ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL SUPPLEMENT 1
Rev.
1
2-1
Nov
21/08
CHAPTER 2
SANDIA SAE5-35 ALTITUDE DATA SYSTEM
SECTION 1
SYSTEM DESCRIPTION
1-1. System
Description
A. The Sandia SAE5-35 is a solid state altitude data system (blind encoder) that
converts pressure altitude into a digital output. The data output is referenced to 29.92 in
Hg (1013 Millibars).
B. The Sandia SAE5-35 outputs altitude data via Gillham Grey Code or two
independent RS232 digital outputs to Mode C transponders. The transponders utilized
include the Bendix/King KT73, KT76A, and KT76C; and the Garmin GTX327 and GTX330.
C. Two configurations of the Sandia SAE5-35 system are available. They are part
numbers 28-22090-1 and 28-22090-3. P/N 28-22090-1 is the standard system installation
and P/N 28-22090-3 is the standard system with the “Altitude In-Flight Monitoring”
function.
D. Power to the Sandia SAE5-35 encoder is provided via the
ENCDR
circuit
breaker (CB) (2 Amp) located on the lower left side of the center pedestal.
E. Refer to the 280FX Rotorcraft Flight Manual Supplement and the current
vendor operating manuals/instructions for operation of the Sandia SAE5-35 altitude data
system.
1-2. Vendor
Publications
A. The Sandia SAE5-35 is to be operated and maintained I/A/W the current
vendor’s instructions to ensure the continued airworthiness of the aircraft. The applicable
vendor manuals are listed in Table 2-1.
Table 2-1. Vendor Manuals
Component Publication
Vendor
Sandia SAE5-35
1. SAE5-35 Pilot’s Guide,
Document
305221
2. SAE5-35 Altitude Data
System Installation Manual,
Document
305186
Sandia Aerospace, Inc.
3700 Osuna Rd. NE, Suite 171
Albuquerque, NM 87109
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