# AD 78-16-04: Weight And Balance Data

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 336
- Effective: October 14, 1978
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-3273
- Registered aircraft: 35 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D367765E75E8718086256A34006915DB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/78-16-04

## The airworthiness directive

78-16-04 CESSNA: Amendment 39-3273. Applies to Model 336 airplanes.

Compliance: Required as indicted, unless already accomplished.

To provide loading instructions which will limit aircraft loading to an acceptable center of gravity, within the next 100 hours time-in-service after the effective date of this AD, accomplish the following:

A) Modify the Cessna weight and balance data included in the Model 336 airplane as follows:

1. Modify the center of gravity moment envelope on Page 1 by drawing a straight line between the two points (3900 pounds - 548,730 pounds-inches and 2500 pounds - 351,751 pounds-inches) and cover or obliterate the lines establishing the right side of the existing center of gravity moment envelope.

2. Modify the normal category center of gravity limits chart on Page 2 by drawing a vertical line at the 140.7 inches aft of datum point from the 2500 to 3900 pounds lines and cover or obliterate the lines establishing the right side of the existing normal category center of gravity limits envelope.

B) Below the existing capacity placard located on the baggage compartment door install a permanent placard which reads as follows:

"CAUTION - AFT CENTER OF GRAVITY LIMITATION MAY RESTRICT LOADING OF THIS COMPARTMENT TO LESS THAN 365 POUNDS"

and operate the aircraft in accordance with this limitation. This placard should be fabricated of .032 inch minimum thickness aluminum or plastic material with minimum 3/16-inch high stamped or engraved letters and installed using threaded or rivet type fasteners.

C) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective October 14, 1978.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A2CE](https://openairdocs.org/tcds/A2CE): Textron Aviation Inc.; names 1 of 1 models: 336

## 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: 35 (35 by airframe model, 0 by engine model)
- Makers: Cessna 35

Models with the most aircraft:

- [Cessna 336](https://openairdocs.org/model/cessna-336): 35 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/78-16-04/models.md
Every aircraft: https://openairdocs.org/ad/78-16-04/aircraft.md

Its text cites no advisory circulars or STCs.

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