# AD 84-13-04: Horizontal Tailplane Flutter

- Type: Airworthiness directive
- Status: Current
- Products: Alexander Schleicher ASW-19 and ASW-19B
- Effective: September 13, 1984
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Glider
- Amendment: 39-4901
- Registered aircraft: 43 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CEBD07EAF03A87C286256A4E00441156.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-13-04

## The airworthiness directive

84-13-04 ALEXANDER SCHLEICHER: Amendment 39-4901. Applies to Model ASW 19 and ASW 19B gliders, serial numbers 19001 to 19402, except 19019 and 19210, certificated in all categories.

Compliance required prior to next flight unless already accomplished.

To prevent the occurrence of horizontal tailplane flutter, accomplish the following:

1. Apply a red radial line on the airspeed indicator at 108 Kts (200 km/h) to indicate the new Never Exceed Velocity (VNE).

2. Affix a placard stating "Maximum Speed 108 Kts (200 km/h)" placed to the airspeed indicator.

3. Enter a notation in the glider flight manual in the airspeed limitations section to read as follows:

Max. Speed to 10,000' MSL 108 Kts (200 km/h) 10,001 to 16,400' MSL 80 Kts (155 km/h) 16,401 to 23,000' MSL 75 Kts (140 km/h) 23,001 to 29,500' MSL 65 Kts (120 km/h)

4. Compliance with this AD is not required when the elevator trailing edge contour change modification described in Alexander Schleicher Technical Note No. 17, dated March 27, 1984, is incorporated.

5. Alternate inspections, adjustment of the inspection interval, or other actions which provide an equivalent level of safety must be approved by the Manager, Brussels Aircraft Certification Office, AEU-100, Europe, Africa, and Middle East Office, FAA, c/o American Embassy, 1000 Brussels, Belgium, telephone 513.38.30 x2710.

The Alexander Schleicher Technical Note No. 17, dated March 27, 1984, identified and described in this directive is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Alexander Schleicher Segelflugzeubau, D-6414 Poppenhausen, Federal Republic of Germany. These documents may also be examined at the Office of Regional Counsel, 12 New England Executive Park, Burlington, Massachusetts 01803.

This amendment becomes effective September 13, 1984, as to all persons except those persons to whom it was made immediately effective by priority letter AD 84-13-04, issued June 26, 1984, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS G36EU](https://openairdocs.org/tcds/G36EU): Alexander Schleicher GmbH & Co. Segelflugzeugbau; names 2 of 2 models: ASW-19B, ASW-19

## 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: 43 (43 by airframe model, 0 by engine model)
- Makers: Schleicher 43

Models with the most aircraft:

- [Schleicher ASW-19](https://openairdocs.org/model/schleicher-asw-19): 26 aircraft (airframe model)
- [Schleicher ASW-19B](https://openairdocs.org/model/schleicher-asw-19b): 17 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/84-13-04/models.md
Every aircraft: https://openairdocs.org/ad/84-13-04/aircraft.md

Its text cites no advisory circulars or STCs.

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