AD 83-23-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN-2 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-2 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-20 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-21 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-26 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-27 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-3 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-6 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-8 | Airworthiness Directives; Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes. |
Unsafe Condition
Fuel mismanagement and possible fuel starvation due to wing tip tank fuel management system deficiencies.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the wing tip tank fuel management system per Pilatus Service Bulletin No. BN-2/SB.157 steps 1-12. Update and annotate the airplane flight manual with specified supplements for each model. Equivalent compliance must be approved by the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 100 hours time-in-service after the effective date of this AD, but no later than December 31, 1983
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Pilatus Model BN-2, BN-2A and BN-2B Islander Series Airplanes equipped with wing tip tanks (Mod NB/M/364) except BN-2A MKIII Series Trislander Airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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