83-11-01 R1: Emergency Flotation System
FAA order 83-11-01 R1 is an airworthiness directive in force since December 20, 1984. The FAA's subject line: Emergency Flotation System. It names Airbus Helicopters AS350 AStar (Écureuil), now H125: about 893 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: other and general.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Airbus Helicopters
- Models
- AS350B, AS350C, AS350D, AS350D1
- On this site
- Airbus Helicopters AS350 AStar (Écureuil), now H125 893 registered
Dates and paperwork
- In force since
- December 20, 1984
- Published
- December 10, 1984
- Docket
- 83-ASW-23
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (2,720 characters)
83-11-01 R1 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS): Amendment 39-4657 as amended by Amendment 39-4959. Applies to all SNIAS Model AS350B, AS350C, AS350D, and AS350D-1 helicopters, certificated in all categories, that have Air Cruiser flotation kits installed in accordance with STC SH4032SW or SH2825SW, and delivered by AHC prior to April 4, 1983. \n\n\tCompliance is required as indicated unless already accomplished in accordance with Aerospatiale Helicopter Corporation Service Bulletin No. SB 350-18, dated April 4, 1983. \n\n\tTo prevent possible failure of the Air Cruiser emergency flotation system, accomplish the following prior to further overwater flight. \n\n\t(a)\tReroute harness and add 1/4 inch diameter heat shrink tubing to electrical harness in accordance with Figure 1. \n\n\t(b)\tAdd 3/4 inch diameter heat shrink tubing to encase both mechanical cable and electrical harness. Assure that 3/4 inch tube overlaps 1/4 inch shrink tubing as shown in Figure 1. \n\n\t(c)Install four supporting clamps, P/N MS21919WDG2, on each float bottle valve assembly side plate (drill and fit per Figure 1). \n\n\t(d)\tInstall three clamps, P/N MS21919WDG36, on each cross tube to support squib harness (reference Figure 2). Ground strap is to be clamped at the lowest point on cross tube that will allow float to be pivoted between operating and ground handling position. \n\n\t(e)\tInspect the harness installation and perform the electrical test described in Air Cruiser's Overhaul Manual, reference 25.60.93, page 706, or FAA approved equivalent. \n\n\t(f)\tMaterials necessary to complete the modification are listed below. \n\n\n\nDESCRIPTION\nPART NUMBER \nSOURCE\nQUANTITY \nRivet\nMS20470AD3-4\nStd. hdw\n4 \nBracket\nAN743-13\nStd. hdw\n2 \nClamp\nMS21919WDG2\nStd. hdw\n8 \nClamp\nMS21919WDG36\nStd. hdw\n6 \nScrew\nNAS603-9P\nStd. hdw\n4 \nWasher\nAN960-10L\nStd. hdw\n4 \nNut\nMS21044N3\nStd. hdw\n4 \nHeat Shrink Tubing\n3/4 Inch\nRaychem\n10 ft.\n\n\n(Mouser Alt) \n\nHeatShrink Tubing\n1/4 Inch \nRaychem\n3 ft.\n\n\n(Mouser Alt)\n\n\n\t\tAmendment 39-4657 became effective June 13, 1983. \n\t\tThis Amendment 39-4959 becomes effective December 20, 1984. \n\n\n\n\t\t\t\t\t\tFIGURE 1, PART 1 \n\t\t\t\t\t\t AD 83-11-01 \n\n\n\n\nHeat Shrink Tubing to Extend Inboard Past \nClamp on Cross Tube. (High & Low Skid Gear) \n\n\n\tNOTE: \n\t\tGround strap to be clamped at lowest point on \n\t\tCross tube that will allow float to be pivoted \n\t\tbetween operating and ground handling position. \n\t\tDo not clamp or otherwise secure ground strap to \n\t\tmech. control & elect wire bundle except where \n\t\tboth can be clamped together on cross tube. \n\nFIGURE 2 \nAD 83-11-01
Related safety bulletins advice on the same designs, not orders
2021-08-13AIR-21-13 · ENGINE EMERGENCY SHUTDOWN SYSTEM
2019-07-15SW-17-23R2 · Fuel System
2018-03-02SW-17-23R1 · Fuel System
2017-08-24SW-17-23 · Fuel System
2015-08-13SW-15-20 · Air Conditioning System Wiring
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/83-11-01 R1.json · aircraft systems.