# AD 71-02-04: Load Evener Indicator Tube

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 747-100 Series, 747-100B Series, 747-100B SUD Series, 747-200B Series, 747-200C Series, 747-200F Series, 747-300 Series, 747-400 Series, 747-400D Series, 747-400F Series, 747SP Series and 747SR Series
- Effective: January 23, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-1146
- Registered aircraft: 63 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EDA99CFCE4A14107862568320048F4C8.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-02-04

## The airworthiness directive

71-02-04 BOEING: Amdt. 39-1146. Applies to all Boeing Model 747 Series airplanes. Compliance required within the next 300 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent the failure of the load evener indicator tube resulting in passenger injury: Replace the existing body gear indicator tube cover with a new tube cover in accordance with Boeing Service Bulletin 32-2031, dated July 24, 1970, or later FAA approved revision, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region. This amendment becomes effective January 23, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 12 of 14 models: 747-100B Series, 747SP Series, 747-400D Series, 747-400F Series, 747-200B Series, 747-200F Series, 747-300 Series, 747-200C Series…

## 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: 63 (63 by airframe model, 0 by engine model)
- Makers: Boeing 63

Models with the most aircraft:

- [Boeing 747-446](https://openairdocs.org/model/boeing-747-446): 10 aircraft (airframe model)
- [Boeing 747-422](https://openairdocs.org/model/boeing-747-422): 8 aircraft (airframe model)
- [Boeing 747-412](https://openairdocs.org/model/boeing-747-412): 5 aircraft (airframe model)
- [Boeing 747-400F](https://openairdocs.org/model/boeing-747-400f): 4 aircraft (airframe model)
- [Boeing 747-409](https://openairdocs.org/model/boeing-747-409): 4 aircraft (airframe model)
- [Boeing 747-481F](https://openairdocs.org/model/boeing-747-481f): 3 aircraft (airframe model)
- [Boeing 747-409F](https://openairdocs.org/model/boeing-747-409f): 3 aircraft (airframe model)
- [Boeing 747-481](https://openairdocs.org/model/boeing-747-481): 3 aircraft (airframe model)
- [Boeing 747-428F](https://openairdocs.org/model/boeing-747-428f): 3 aircraft (airframe model)
- [Boeing 747-123](https://openairdocs.org/model/boeing-747-123): 2 aircraft (airframe model)
- [Boeing 747-251F](https://openairdocs.org/model/boeing-747-251f): 2 aircraft (airframe model)
- [Boeing 747-443](https://openairdocs.org/model/boeing-747-443): 2 aircraft (airframe model)
- [Boeing 747-438](https://openairdocs.org/model/boeing-747-438): 2 aircraft (airframe model)
- [Boeing 747-428](https://openairdocs.org/model/boeing-747-428): 2 aircraft (airframe model)
- [Boeing 747-257B](https://openairdocs.org/model/boeing-747-257b): 1 aircraft (airframe model)
- [Boeing 747-283B](https://openairdocs.org/model/boeing-747-283b): 1 aircraft (airframe model)
- [Boeing 747-121](https://openairdocs.org/model/boeing-747-121): 1 aircraft (airframe model)
- [Boeing 747-131](https://openairdocs.org/model/boeing-747-131): 1 aircraft (airframe model)
- [Boeing 747-128](https://openairdocs.org/model/boeing-747-128): 1 aircraft (airframe model)
- [Boeing 747-273C](https://openairdocs.org/model/boeing-747-273c): 1 aircraft (airframe model)

All 24 models: https://openairdocs.org/ad/71-02-04/models.md
Every aircraft: https://openairdocs.org/ad/71-02-04/aircraft.md

Its text cites no advisory circulars or STCs.

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