# Airworthiness Directives; Boeing Model 777-200 and -300 Series Airplanes
> **Rule** · Final rule; correction. · Published 1999-12-22 · Effective 1999-12-23 · 64 FR 71635
## Document
- **Document number:** 99-33167
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 777-200 and -300 Series
- **Type:** Rule
- **Action:** Final rule; correction.
- **Citation:** 64 FR 71635
- **Publication date:** 1999-12-22
- **Effective date:** 1999-12-23
- **FAA docket:** Docket No. 99-NM-323-AD
## Abstract

This document corrects two typographical errors that appeared in airworthiness directive (AD) 99-25-13 that applies to all Boeing Model 777-200 and -300 series airplanes. That AD currently requires revising the Limitations Section of the Airplane Flight Manual to prohibit the dispatch of certain airplanes under certain conditions. That AD also requires repetitive inspections to ensure correct operation of the backup generators; and, for certain airplanes, a one- time inspection to detect damage of the engine external gearbox; and corrective actions, if necessary. This document corrects incorrect paragraph references. This correction is necessary to ensure that operators accomplish the appropriate requirements of the AD.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/12/22/99-33167/airworthiness-directives-boeing-model-777-200-and--300-series-airplanes)
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