AD 98-04-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | B-N Group Ltd. | BN-2 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-2 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-20 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-21 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-26 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-27 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-3 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-6 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
| aircraft | B-N Group Ltd. | BN-2A-8 | Airworthiness Directives; Pilatus Britten-Norman Ltd. BN-2, BN-2A, and BN-2B Series Airplanes. |
Unsafe Condition
Failure of the generator terminal diodes on the STBD (RIGHT) GEN and PORT (LEFT) GEN switches (SW2 and SW3) could result in loss of electrical power to navigation, communications, and lighting systems, impairing the pilot's ability to maintain control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove existing diodes (P/N 340502014, type 10B1 or 10D1) from the terminals of SW2 and SW3, install new approved diodes (P/N NB-81-5873, type 60S6) per Pilatus SB BN-2/SB.228 Issue 2. Compliance with this AD is considered incorporation of Modification NB/M/1571.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 50 hours time-in-service (TIS) after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
BN-2, BN-2A, and BN-2B series airplanes (all serial numbers) with Pilatus Modification NB/M/1148 (70 amp DC Generation System) incorporated and without Modification NB/M/1571 (Introduction of Increased Rated Diode-70 amp DC Generation System)
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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