Showing posts with label SID. Show all posts
Showing posts with label SID. Show all posts

Monday, September 3, 2012

Inspection Interval Requirements


                                  Operation Details
1 - Every 100 hours of operation or 12 months, whichever occurs first.
2 - CPCP(Baseline Program) items that are to be examined every 12 months.
3 - CPCP(Baseline Program) items that are to be examined every 24 months. 
4 - CPCP(Baseline Program) items that are to be examined every 36 months.
5 - CPCP(Baseline Program) items that are to be examined every 48 months.
6 - CPCP(Baseline Program) items that are to be examined every 60 months.
7 - SID items that are to be examined after the first 10,000 hours of operation or 20 years, whichever occurs first. The inspection is to be repeated every 3,000 hours of operation or 5 years, whichever occurs first, after the initial inspection has been accomplished.
8 - SID items that are to be examined after the first 3,000 hours of operation or 5 years, whichever occurs first. The inspection is to be repeated every 3,000 hours of operation or 5 years, whichever occurs first, after the initial inspection has been accomplished.
9 - SID items that are to be examined after the first 3,000 hours of operation or 10 years, whichever occurs first. The inspection is to be repeated every 500 hours of operation or 5 years, whichever occurs first, after the initial inspection has been accomplished.
10 - SID items that are to be examined after the first 5,000 hours of operation or 20 years, whichever occurs first. The inspection is to be repeated at engine overhaul, after the initial inspection has been accomplished.
11 - SID items that are to be examined after the first 20 years. The inspection is to be repeated every 10 years after the initial inspection has been accomplished, for airplanes operating in a mild or moderate corrosion environment.
12 - SID items that are to be examined after the first 5 years. The inspection is to be repeated every 5 years after the initial inspection has been accomplished, for airplanes operating in a mild or moderate corrosion environment.
13 - SID items that are to be examined after the first 10 years. The inspection is to be repeated every 5 years after the initial inspection has been accomplished, for airplanes operating in a severe corrosion environment.
14 - SID items that are to be examined after the first 1,000 hours. The inspection is to be repeated every 1,000 hours after the initial inspection has been accomplished.
15 - SID items that are to be examined after 3,000 hours or 5 years, whichever occurs first. The inspection is to be repeated every 1,000 hours or 5 years, whichever occurs first, after the initial inspection has been accomplished.
16 - SID items that are to be examined after the first 10 years. The inspection is to be repeated every 10 years after the initial inspection has been accomplished, for airplanes operating in a mild or moderate corrosion environment.
17 - SID items that are to be examined after the first 5 years. The inspection is to be repeated every 5 years after the initial inspection has been accomplished, for airplanes operating in a severe corrosion environment.
18 - SID items that are to be examined after 12,000 hours or 20 years, whichever occurs first. The inspection is to be repeated every 2,000 hours or 10 years, whichever occurs first, after the initial inspection has been accomplished, for airplanes operating in a typical usage environment.
19 - SID items that are to be examined after the first 6,000 hours of operation or 10 years, whichever occurs first. The inspection is to be repeated every 1,000 hours of operation or 5 years, whichever occurs first, after the initial inspection has been accomplished, for airplanes operating in a severe usage environment.
20 - SID items that are to be examined after the first 10,000 hours of operation or 20 years, whichever occurs first. The inspection is to be repeated every 2,000  hours of operation or 4 years, whichever occursfirst, after the initial inspection has been accomplished.
21 - SID items that are to be examined after the first 3 years. The inspection is to be repeated every 3 years after the initial inspection has been accomplished, for airplanes operating in a severe corrosion environment.
22 - SID items that are to be examined after the first 100 hours of operation or 1 year, whichever occurs first. The inspection is to be repeated every 100 hours or 1 year whichever occurs first, after the initial inspection has been accomplished.
23 - SID items that are to be examined after the first 2,000 hours of operation or 4 years, whichever occurs first. The inspection is to be repeated every 2,000 hours or 4 years, whichever occurs first, after the initial inspection has been accomplished.
24 - Expanded Maintenance Inspection items that are to be examined after the first 100 hours of operation. The inspection is to be repeated every 600 hours of operation or 12 months, whichever occurs first, after the initial inspection has been accomplished.

Selection Criteria - PSE


(1) The factors used to find the PSE's  include:
(a) Service Experience
1 Multiple sources of information were used to find the service discrepancies.
a Cessna Service Bulletins and Service Information Letters issued to repair common service discrepancies were examined.
b FAA Service Difficulty Records and Foreign certification agency Service Difficulty Records were examined.
2 Existing analyses were reviewed to identify components in areas that may have exhibited the potential for additional inspection requirements.
3 A review of test results applicable to the design was made to identify the critical areas of the PSE's.
3. Usage

A. Aircraft Usage
                      (1) Aircraft usage data for the SID program is based on the evaluation of the in-service utilization of the aircraft. This data was used to develop the representative fatigue loads spectra. Operational data for development of the Supplemental Structural Inspection Program was obtained from surveys of aircraft operators.
                     (2) Usage for spectra determination is defined in terms of a single flight representing typical average in-service utilization of the aircraft. This usage reflects the typical in-service flight variation of flight length, takeoff gross weight, payload and fuel.
                     (3) The flight is defined in detail in terms of a flight profile. The profile identifies the gross weight, payload, fuel, altitude, speed, distance etc., required to define the pertinent flight and ground parameters needed to develop the fatigue loads. The flight is then divided into operational segments, where each segment represents the average values of the parameters (speed, payload, fuel etc.) that are used to calculate the loads spectrum.
B. Stress Spectrum.
                  (1) A fatigue loads spectrum, in terms of gross area stress, was developed for each PSE to be analyzed based on the usage-flight profiles. The spectrum represents the following loading environments: flight loads (gust and maneuver), landing impact, taxi loads and ground-air-ground cycles. The resulting spectrum is a representative flight-by-flight, cycle-by-cycle loading sequence that reflects the appropriate and significant airplane response characteristics.
                (2) After reviewing the aircraft usage data and the way in which the surveyed aircraft were flown, two sets of stress spectra were developed. The first flight profile represents typical usage, while the second profile represents severe usage.




PSE Data Sheets


                                         
A data sheet for each PSE is provided in Section 2A-14-XX -
Each data sheet contains the following:
(1) Supplemental Inspection Number
(2) Title
(3) Effectivity
(4) Inspection Compliance
(5) Initial Inspection Interval(s)
(6) Repeat Inspection Interval(s)
(7) Purpose
(8) Inspection Instructions
(9) Access/Location/Zone
(10) Detectable Crack Size
(11) Inspection Procedure
(12) Repair/Modification
(13) Comments
NOTE: Inspection intervals are given in both hour and calendar time. After the completion of each initial SID inspection, repeat inspections may be completed based on hour time if the Corrosion Prevention and Control Program (CPCP) in Section 2A-30-00 is included in the airplane maintenance program.



STC Modifications



(1) The Cessna Model 152 airplanes can have modifications that were done by STCs by other organizations without Cessna Engineering approval. The inspection intervals given in this SID are for unchanged airplanes.

(2) Airplanes that have been modified to alter the airplane design, gross weight or airplane performance may need to be inspected more frequently. Examples of common STC's not covered by this SID document include non-Cessna wing extensions, winglets, speed brakes,STOL conversions, vortex generators, tip tanks, under wing tanks and nonstandard engines. The owner and/or maintenance organization should contact the STC holder(s) or modification originator for obtaining new FAA approved inspection criteria.

C. The SID inspection times are based on total airframe hours OR calendar times in service. If a specific airframe component has been replaced, the component is to be inspected, based on total component hours or calendar time requirements. However, any attachment structure that was not replaced when the component was replaced must be inspected, based on the total airframe hours or calendar time requirements. Inspections are due at the lessor of specified flight hours or calendartime. The inspections must be completed by June 30, 2014.

Inspection Method & Document


 Inspection Methods
A very important part of the SID program is selecting and evaluating state-of-the-art nondestructive inspection (NDI) methods applicable to each PSE.
Potential NDI methods were selected and evaluated on the basis of crack orientation, part thickness and accessibility. Inspection reliability depends on size of the inspection task, human factors (such as qualifications of the inspector), equipment reliability and physical access. Visual, fluorescent, liquid penetrant, eddy current and magnetic particle methods are used.


 Related Documents
A. Existing Inspections, Modifications, and Repair Documents
(1) Cessna has a number of documents that are useful to maintaining continued airworthiness of airplanes.
(a) Cessna Model 152 Service Manual (P/N D2064-1-13).
(b) Cessna Model 152 Illustrated Parts Catalog (P/N P692-12)
(c) Cessna Single Engine Service Information Letters and Service Bulletin Summaries.
(d) Cessna Service Newsletters and Newsletter Summaries.

Supplemental Inspection Document


          The SSIP (SSID) for the Cessna 152 airplane is based on the affected Model 152 airplane current usage, testing and inspection methods.
                          A practical state of-the-art inspection program is established for eachPrinciple Structural Element (PSE).
                         A PSE is that structure whose failure, if it remained undetected, could lead to the loss of the airplane. Selection of a PSE is influenced by the susceptibility of a structural area, part or element to fatigue, corrosion, stress corrosion or accidental damage.
                     The inspection program consists of the current structural maintenance inspection, plus supplemental inspections, as required, for continued airworthiness of the airplane as years of service are accumulated.
                        The current inspection program is considered to be adequate in detecting corrosion and accidental damage.The emphasis of the SSIP is to detect fatigue damage whose probability increases with time.Since fatigue damage increases at an increasing rate with increasing crack length, earlier detection and repair minimizes the damage and the magnitude of the repair.
                          The SSIP is valid for Model 152 airplanes with less than 30,000 flight hours. Beyond this, continued airworthiness of the airplane can no longer be assured. Retirement of this airframe is recommended when 30,000 flight hours has been accumulated.
      B. Function : The function of the SSIP is to find damage from fatigue, overload or corrosion through the use of the Nondestructive Inspections (NDI) and visual inspections.
                 This Supplemental Inspection Document (SID) is only for primary and secondary airframe components. Engine, electrical items and primary and secondary systems are not included in this document. A list is included to show the requirements for the SID program for primary and secondary airframe components.
(a) The airplane has been maintained in accordance with Cessna's recommendations or the equivalent.
(b) If the SID is for a specific part or component, you must examine and evaluate the surrounding area of the parts and equipment. If problems are found outside these areas, report them to Cessna Aircraft Company on a reporting form. Changes can then be made to SID program, if necessary.
(c) The inspections presented in the SID apply to all Model 152 airplanes. The inspection intervals presented are for unmodified airplanes. Airplanes that have been modified to alter the airplane's design, gross weight or performance may need to be inspected more frequently. Examples of common STCs, which will require modified inspection intervals, include non-Cessna wing extensions, winglets, speed brakes, STOL conversions, vortex generators, tip tanks, under wing tanks and nonstandard engines. The owner and/or maintenance organization should contact the STC holder(s) or modification originator for obtaining new FAA-approved inspection criteria.
(2) A Corrosion Prevention and Control Program (CPCP) should be established for each airplane.

Cessna 152 MM TR05



 

                    Cessna published the maintenance manual temporary revisions containing the 100 series supplemental inspection program requirements for models delivered with maintenance manuals.
                   These inspections were developed from condition reports, service difficulty reports and data gathered from maintenance professionals. When properly performed, these inspections will identify issues that will contribute to the reduction in structural load carrying capabilities of the airframe.
                      The compliance statement as follows allows a two year grace period for performance of the initial inspection:
                       The SID inspection times are based on total airframe hours or calendar time in service. If a specific airframe component has been replaced, the component is to be inspected, based on total component hours or calendar time requirements. However, any attachment structure that was not replaced when the component was replaced must be inspected, based on the total airframe hours or calendar time requirements. Inspections are due at the lesser of specified flight hours or calendar time. The inspections must be completed by June 30, 2014.
Cessna 152
TEMPORARY REVISION NUMBER 5
DATED 1 DECEMBER 2011
MANUAL TITLE Model 152 Series 1978 Thru 1985 Service Manual
MANUAL NUMBER - PAPER COPY D2064-1-13
TEMPORARY REVISION NUMBER D2064-1TR5
MANUAL DATE 7 February 1985 REVISION NUMBER 1 DATE 2 October 1995

REASON FOR TEMPORARY REVISION
1. To add the Supplemental Inspection Documents (SIDs) Information.
2. To add the Corrosion Prevention and Control Program (CPCP) Information.Manual R
3. To add Control Cable Inspection Information.