85-07-03 R1 SPERRY FLIGHT SYSTEMS, AVIONICS DIVISION: Amendment 39-5026 as amended by Amendment 39-5411. Applies to Sperry Model SPZ-7000 with FZ-700 computer Part No. 7003183-901 or 7003183-902 installed. The SPZ-7000 installation is known to exist on, but may not be limited to, Sikorsky Model S-76A helicopters modified in accordance with Supplementary Type Certificate (STC) No. SH2218NM, and S.N.I.A.S. Model AS-365N helicopters modified in accordance with STC No. SH2215NM.
Compliance is required within ten (10) days after the effective date of this AD, unless previously accomplished.
To prevent improper (dangerous) excursions from the glide slope during instrument landing system (ILS) approach, accomplish the following:
A. Install a placard adjacent to the autopilot/flight director mode selector in full view of pilot, stating "DO NOT ENGAGE ILS MODE ABOVE 2000 FEET AGL DURING ILS APPROACH."
B. Installation of FZ-700 computers, Part Number (P/N) 7003138-902 with modification "E" incorporated, on Sikorsky S-76A helicopters; or P/N 7003138-901 with modification "F" incorporated, on S.N.I.A.S. Model AS-365N helicopters; constitutes terminating action for the requirement of paragraph A. of this AD.
C. Alternate modifications or other actions which provide an acceptable level of safety may be used when approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region.
All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Sperry Corporation, Aerospace and Marine Group, P.O. Box 29000, Phoenix, Arizona 85038. These documents may be examined at the FAA, Northwest Mountain Region, 17900 Pacific Highway South, Seattle, Washington, or at the Western Aircraft Certification Office, 15000 Aviation Boulevard, Hawthorne, California.
Amendment 39-5206 became effective April 15, 1985.
This amendment, 39-5411, becomes effective September 14, 1986.