# AD 79-19-06: Fuel Flow System Per STC SA3835WE

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 210L, 210M, P210N, T210L and T210M with STC SA3835WE
- Effective: September 17, 1979
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3558
- Registered aircraft: 1,403 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F53895E5EBC8739086256A34006AB7B7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/79-19-06

## The airworthiness directive

79-19-06 CESSNA AIRCRAFT COMPANY: Amendment 39-3558. Applies to Cessna Model 210L, Model T210L, Serial Numbers 21061040 and subsequent, Model 210M, Model T210M and Model P210N series airplanes modified to incorporate Symbolic Displays, Inc. fuel flow indicating system per STC SA3835WE.

Compliance required within 25 hours' time-in-service or thirty (30) days from the effective date of this AD, whichever occurs first, unless already accomplished.

To prevent a possible fuel leak caused by the installation of Symbolic Displays, Inc. fuel flow indicating system per STC SA3835WE accomplish the following:

  (a) Inspect the fuel flow transducer installation on the upper left side of the engine near the fuel distributor manifold.

  (b) If a 4 inch long flexible hose (Aeroquip P/N AE7010001E0040 or Stratoflex P/N 111D417-4S-0040) is installed between the transducer and the fuel distributor, no further action is required per this AD.

  (c) If an NAS 424-4 coupling is installed between the fuel flow transducer and the fuel distributor, remove and replace the coupling with hose assembly Aeroquip Part Number AE7010001E0040 or hose assembly Part Number 111D417-4S-0040 (Stratoflex).

NOTE: Symbolic Displays, Inc. Service Information Bulletin No. 72 dated June 15, 1979 and Installation Diagram Drawing No. 204724, Revision "B," pertain to this matter.

  (d) Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.

This amendment becomes effective September 17, 1979.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A21](https://openairdocs.org/tcds/3A21): Textron Aviation Inc.; names 5 of 28 models: P210N, T210M, 210M, 210L, T210L

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 1,403 (1,403 by airframe model, 0 by engine model)
- Makers: Cessna 1,403

Models with the most aircraft:

- [Cessna P210N](https://openairdocs.org/model/cessna-p210n): 421 aircraft (airframe model)
- [Cessna T210M](https://openairdocs.org/model/cessna-t210m): 321 aircraft (airframe model)
- [Cessna T210L](https://openairdocs.org/model/cessna-t210l): 305 aircraft (airframe model)
- [Cessna 210L](https://openairdocs.org/model/cessna-210l): 234 aircraft (airframe model)
- [Cessna 210M](https://openairdocs.org/model/cessna-210m): 122 aircraft (airframe model)

All 7 models: https://openairdocs.org/ad/79-19-06/models.md
Every aircraft: https://openairdocs.org/ad/79-19-06/aircraft.md

## Related documents

- [STC SA3835WE](https://openairdocs.org/stc/SA3835WE): Installation of Hoskins Model CFS-1000, -1001, FT-100 or FT-101 fuel flow indicating system.. Sandia Aerospace Corporation, Named in the applicability

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