NOTICE
Weight and balance or operating limitation changes shall be entered in the appropriate aircraft record. An alteration roust be
compatible with all previous alterations to assure continued conformitv with the aoo/icable airworthiness reauirements.
8. Description of Work Accomplished
(If more space is required, attach additional sheets. Identify with aircraft nationality and registration marl< and date worl< completed.)
BELL 412EP S/N 36106 N82628
PAGE1
Installed 1 ea Wulfsberg FlexComm II AM/FM Transceiver System provisions only (mounting and wiring provisions
wl AT 5000
antenna), using the Wulfsberg Installation Manual PIN 150-1355-000, Rev. C, dated July 15, 1998, and ref:
EA DWG# AV2369. The
Wulfsberg FlexComm 11 System provisions consist of the following equipment:
Wulfsberg RT-5000 AM/FM
R/T provisions at F.S. 7.0, Wulfsberg RT 138 FM R/T provisions at F. S. 7.0 and 153-040047-01
Logic Converter provisions at F.S. -5.0 in the avionics bay nose compartment.
Motorola DES-100 Encryption Unit provisionsat F.S. 4. in the avionics bay nose compartment adjacent to the RT-500.
Wulfsberg C-5000 Controller wiring provisionsat F.S. 25 in the avionics radio console .
Wulfsberg AT 5000 (P/N121-0400405-01) Antenna at F.S. 30 on aircraft belly inspection panel using a 2024T3 .062" doubler
and "MS" hardware, ref: AC 43.13-2A Chap 3 fig. 3.3.
All work was completed referencing the above listed manuals and, the BELL HELICOPTER TEXTRON BELL MAINTENANCE
MANUAL, BHT-412-MM, Rev.4, and AC 43.13-1 B Chap. 3, sec. 2, Chap. 4, para. 4-53 thru 4-58, Chap. 6, sec. 1,
& sec. 3, para. 6-
. 29, ·&-6-30~-cliap.7, sec. nhru-7, Chap.-10.-ch-ap.·11 Sec. 1 para. 11:::1.-11-2; Sec. 3 para: 11-30, 11::31, 11-32'. &-11-37;-Sec. 4,
para. 11-47, thru 11-52; Sec. 5, thru 17, & Chap. 12, Sec. 1, 2 & 3. ALL EDWARDS & ASSOCIATES drawings were developed from
each piece of equipment's manufacturer's installation instructions/schematics, and BHT's aircraft wiring schematics, and were
provided to the aircraft's owner/operator.
The aircraft was weighed and a new weight and balance computed. Revised aircraft's flight manual equipment list. Provided
Instructions for Continued Airworthiness (ICA), as part of this FAA FORM 337, as addressed by Flight Standards Information Bulletin
for Airworthiness FSAW 98-03, using the checklist in FAA Bulletin HBAW 98-18, see below. The ICA contained in this FAA Form
337 is now part of the aircraft's inspection/maintenance requirements. Log book entry made. REF:
WIO C01226EA/1.
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS
1. INTRODUCTION: The Bell Model 412 is a FAR PART
29 Cat. B certified helicopter. The above listed modification is for the installation
of optional equipment provisions that has been installed 1/A/W this field approved FAA FORM 337.
2. DESCRIPTION: The modification was completed to provide the aircraft with Wulfsberg Flexcom II provisions ..
3. CONTROL, OPERATION INFORMATION: NIA- equipment not installed
4. SERVICING INFORMATION: N/A - equipment not installed
5. MAINTENANCE INSTRUCTIONS: This modification shall be inspected at
BHT Scheduled Inspections PART A or PART B as
applicable (ref: BHT-412-MM below), and Annually
1/AIW:
(a) The scope and detail contained in FAR 43 Appendix D, as applicable to the particular line item(s).
(b) BELL HELICOPTER TEXTRON BELL MAINTENANCE MANUAL, BHT-412-MM, Rev.4, (or later revision), Chap. 5 -
INSPECTIONS; ( NOTE: aircraft maintenance manuals are
available to each aircraft owner from BELL HELICOPTER TEXTRON).
(c) Manufacturer's publications, as referenced in section 8 of this FAA FORM 337; (NOTE: many manufacturer's publications are
proprietary to the manufacturer and it's approved facilities), Inspections, maintenance and/or repairs are limited
to persons
authorized by FAR
43, paragraph 43.3, with the approved current publications, and training.
6. TROUBLE
SHOOTING: NIA - equipment not installed '
7. REMOVAL AND REPLACEMENT: NIA - equipment not installed
8. DIAGRAMS: NIA
9. SPECIAL INSPECTIONS REQUIREMENTS: NIA
10. APPLICATION OF PROTECTIVE TREATMENTS: NIA
11. DATA: REF: Advisory Circular AC
43.1~18 Chapter 7.
12. UST OF SPECIAL TOOLS: NIA
13. COMMUTER CATEGORY AIRCRAFT: NIA
14. RECOMMENDED OVERHAUL PERIODS: No additional overhaul time limitations.
15. AIRWORTHINESS LIMITATION SECTION: No additional airworthiness limitations.
16. Revisions:
Any revisions or alterations of this ICA must be approved via FAA Form 337 Field Approval Process.
-END-
D Additional Sheets are Attached
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