AD 87-23-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | Heath Tecna | 747-100 Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-100B Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-100B SUD Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-200B Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-200C Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-200F Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-300 Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-400 Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-400D Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
| aircraft | The Boeing Company | Heath Tecna | 747-400F Series | Airworthiness Directives; Heath Tecna Service Bulletin 74000-25-007, dated March 6, 1987. |
Unsafe Condition
Chafing of ceiling light wire bundles causing fire hazard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect lighting wire bundles atop the Heath Tecna 'Superbins' for damage and chafing within 60 days after the effective date, repair before further flight, and either install spacers per SB 74000-25-007 or trim ceiling panel edges per paragraph 2C of the SB.
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Compliance Time
Within 60 days after the effective date of this AD
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Affected Aircraft
Boeing Model 747 airplanes modified under Supplemental Type Certificate SA2365NM and listed in Heath Tecna Service Bulletin 74000-25-007.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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