EASA AD ISR-I-24-2018-09-7R2
Electrical Power - Upper and Lower Front Relay Box Replacement
Summary
The Electrical Power - Upper and Lower Front Relay Box Replacement Airworthiness Directive issued by the State of Israel Ministry of Transport Civil Aviation Authority applies to GALP model G150 aircraft with serial numbers 201 through 326. This directive mandates the replacement of specific upper and lower front relay boxes to address potential corrosion issues in the relay box connector solder joints. The replacement involves upgraded parts with acrylic conformal coating to enhance reliability and safety.
What Changed
This revision updates the compliance time for the initial Airworthiness Directive ISR-I-24-2018-09-7 Revision 1. It requires operators to remove and replace the upper front relay box part numbers 25G8130301-510/-512/-514/-516 with the upgraded 25G8130301-516 MOD A version, and the lower front relay box part number 25G8130300-XXX with the improved 25G8130300-520 MOD A version, following Gulfstream Service Bulletin No. 150-24-193 dated January 6, 2018 or later approved revisions.
Why It Matters
This directive is critical for aviation professionals because it addresses a potential safety risk caused by corrosion in relay box connectors, which could affect electrical power systems on GALP G150 aircraft. Compliance ensures continued airworthiness and prevents possible electrical failures. Maintenance and compliance teams must prioritize this replacement to avoid operational disruptions and regulatory non-compliance.
What To Do
Operators of GALP G150 aircraft serial numbers 201 through 326 must schedule and complete the removal and replacement of the specified upper and lower front relay boxes during the next suitable planned maintenance inspection. This action must be completed no later than December 31, 2023. All work should be performed in accordance with Gulfstream Service Bulletin No. 150-24-193 or its later approved revisions.
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