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   Repair . A design change to an aeronautical product intended to restore it to an airworthy condition and to ensure that the aircraft continues to comply with the design aspects of the airworthiness requirements used for the issuance of a Type Certificate for that aircraft type after it has been damaged or subjected to wear.  Major repair . Any repair of an aeronautical product that might appreciably affect the structural strength, performance, powerplant, operation flight characteristics or other qualities affecting airworthiness or environmental characteristics, or that will be embodied in the product using non-standard practices.  Minor repair. A repair other than a major repair.                     Repairs covered in the Structural Repair Manual (SRM) may be carried out by  Approved Maintenance Organisation as per data available in SRM without any  prior approval from the DGCA.  Re...

Modifications covered in ADs, DGCA Man  Mod and SB do not require DGCA approval.  For modifications  apply to RAO along with evidences and data relating to the intended modifications and its effect on the airworthiness of aircraft       Modification design data and documents prepared by the aircraft, component or  equipment manufacturer and approved by State of Design are acceptable for use in modification of aircraft, components or equipment. This data shall be certified by Authorized Representatives (AR)/ Designated Engineering representatives (DER) of the State of Design of the aircraft.      The person responsible for the modification design shall state any particular  requirements to be observed when the modification is completed and before an  aircraft, component or equipment is released for service. The following aspects  shall be considered:         (a) Whether tests or inspections ...

                    Both manufacturers Lycoming and Continental agree that inactivity in excess of 30 days strongly suggests the need for some special preservation methods and chemicals, especially if the aircraft is located near salt water or similar humid environment. Lycoming Service Letter SL180 Engine Preservation for Active and Stored Aircraft Lycoming's procedure is as follows:          Install a preservative by one of the following methods: Drain the lubricating oil from the sump or system and replace with a preservative oil mixture. This preservation mixture consists of one part by volume MIL-C-6529C Type I concentrated preservative compound added to three parts by volume of MIL-L-6082C (SAE J1966), Grade 1100, mineral aircraft engine oil or oil conforming to MIL-C-6529C Type II. Follow carefully the manufacturer's instructions before use.          An alternative...

          Blown tires during landing are sometimes caused by frozen brake stacks during flights in cold weather conditions. In most situations when this has happened, the brakes did not incur any damage and were not covered under warranty if replaced.             Each of the model Flight Manuals provide instructions to snub the brakes during taxi operations in freezing conditions with moisture present. It is also important to remember to cover wheel and brake assemblies when washing the aircraft. Operators can refer to the procedures outlined in the respective maintenance manuals; offering instructions on how to place covers on all airplane tires, brake assemblies, and wheel assemblies when the aircraft is being washed.          CAUTION: Do not pressure-wash the wheels or brakes. The carbon disks in the brake assemblies must be kept dry. Degradation of the carbon properties and possible freezing of th...

       To be carried out before preflight.                With the airplane in the normal ground attitude and starting at the highest drain location, check all drain locations for contaminants before every flight, whether or not refueling has occurred. Have fuel sample disposal provisions, proper lighting, and a small ladder at your disposal to properly check for fuel tank system contamination. • Drain at least one cup of fuel (using a clear sampler cup) from each drain location. • Drain the fuel strainer as required to completely flush its contents in each of the fuel selector positions. • Check for water, clarity, cloudiness, haze, proper fuel type/grade (i.e.; 100LL is light blue in tint, jet fuel is clear or yellowish), odor, or other contaminants. • If any contamination is detected in the fuel tank system, thoroughly drain all drain locations again. • If contamination is observed, take further samples until the fue...

Introduction : In Quality Manager/controlling officer meet held on 4 th November 2011 at New Delhi, It is observed by dgca that organisation are not preparing and following the standard procedure. Regional DGCA office has been directed to carry out audit for Procedure Manual.                  Procedure Manual is Level 2 document and it need not require approval from DGCA. But, it is mandatory to prepare manual for each department and get approval from Quality Manager.      Definition -  Procedure:A fixed, step-by-step sequence of   activities   or   course of action   (with   definite   start and end   points ) that must be followed in the same   order   to correctly perform a   task . Repetitive procedures are called   routines . A procedure specifies the way to perform an activity (HOW), e.g. Internal Audit procedure. Pr...

FAA advised revised fuel sampling procedure before preflight. Procedure  With the airplane in the normal ground attitude and starting at the highest drain location, check all drain locations for contaminants before every flight, whether or not refueling has occurred. Have fuel sample disposal provisions, proper lighting, and a small ladder at your disposal to properly check for fuel tank system contamination. • Drain at least one cup of fuel (using a clear sampler cup) from each drain location. • Drain the fuel strainer as required to completely flush its contents in each of the fuel selector positions. • Check for water, clarity, cloudiness, haze, proper fuel type/grade (i.e.; 100LL is light blue in tint, jet fuel is clear or yellowish), odor, or other contaminants. • If any contamination is detected in the fuel tank system, thoroughly drain all drain locations again. • If contamination is observed, take further samples until the fuel appears clear,...