This advisory circular (AC) provides information on engine time in service
interval extensions. The AC explains the background of engine time in service intervals
as well as the Federal Aviation Administration’s (FAA) regulatory requirements for time
limitations and time in service intervals for engine overhauls. The AC also provides
aircraft operators with information on the best practices for an engine time in service
interval extension program and how to obtain an engine time in service interval
extension.

This advisory circular (AC) provides guidance to holders of certificates under
Ti tie 14 of the Code of Federal Regulations (CFR) parts 119 and 125 and foreign air carriers
issued operations specifications under 14 CFR part 129 (operators) who voluntarily disclose
to the Federal Aviation Administration (FAA) their violation(s) of certai n hazardous
materials regulations (HMR) under this voluntary disclosure reporting program (VDRP).
This also provides guidance on the new process used to submit hazmat-related voluntary
disclosures, which is now closely aligned with the process used by the F AA’s Flight
Standards Service (AFS).

This notice prescribes guidance that pertains to issuing NOTAMs and
informing facilities of Obstruction Light Outages that may have an effect on flight operations. This
notice also provides administrative corrections.

This change revises the applicant responsibilities for submitting part marking data.

This notice provides guidance to regional personnel, Office
Managers, Front Line Managers (FLM), and principal inspectors (PI) on a flexible and
easy-to-use method for resourcing certificate management work across multiple offices within
a region and nationwide in order to achieve the best use of PIs while adhering to the principles of
Article 25 of the Professional Aviation Safety Specialist (PASS) and the Federal Aviation
Administration (FAA) Collective Bargaining Agreement (CBA). This notice contains
information that is administrative in nature.

This notice directs principal operations inspectors (POI) to conduct
a focused program review of Title 14 of the Code of Federal Regulations (14 CFR) part 135
approved helicopter training and qualification programs.