# Proposed AD 98-NM-380-AD: Bombardier Model DHC-8-100 and -300 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-11-20
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 31, 2000, 65 FR 17206
- Comments due: May 1, 2000
- Became: [AD 2000-11-20](https://openairdocs.org/ad/2000-11-20)
- Docket: 98-NM-380-AD
- FR document: 00-8020
- Official PDF: https://openairdocs.org/files/sha256/db/29/db2900e730213c7032123f9298cbe946402752a6d48430551765fb7ea79d8b01 (from https://www.govinfo.gov/content/pkg/FR-2000-03-31/pdf/00-8020.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/03/31/00-8020/airworthiness-directives-bombardier-model-dhc-8-100-and--300-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-380-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model DHC-8-100 and -300 series airplanes. This proposal would require revising the Aircraft Log Book to correct the airplane Production Modification List; performing an inspection to determine which bonded skin panels on the airplane require bonding integrity inspections (BII); and revising the Airworthiness Limitations List of the Approved Maintenance Plan to include the BII requirements. This proposal also would, for certain airplanes, require repetitive ultrasonic bond inspections to detect disbonding of airplane skin panels, and repair, if necessary. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent damage to bonded skin panels to go undetected, which could result in failure of the bonded skin panels, and consequent loss of controllability of the airplane.

## Notices in this docket

- Mar 31, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-8020, comments due May 1, 2000 (https://www.federalregister.gov/documents/2000/03/31/00-8020/airworthiness-directives-bombardier-model-dhc-8-100-and--300-series-airplanes)

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