Presented to: By: Date: **Federal Av**  **iation Ad**  **ministration** 

# ECi **Cylinder Airworthiness**  **Directive Comparison**  **of Recommendations** 

NTSB Wa yne Maguire, FAA, Eng. & Prop. Directorate June 9, 2015**Federal Av**  **iation Ad**  **ministration** 

# Comparison **of ECi**  **, NTSB, & FAA Recommendations** 

NTSB Meeting June 9, 2015 For Internal FAA Use Only 2**Federal Av**  **iation Ad**  **ministration** 

# FAA NPRM & **ECi Recommendation** 

NTSB Meeting June 9, 2015 For Internal FAA Use Only 3 **TBO**
**1000 500**  **TIS (hrs)**

**ECi Cylinder Serial Number 33696 33697**  **1 61**  **176 Remov**  **e**
**750 25526**  **25527 64016**  **Remov e**  **or calibrate CHT** ECi June 201 1 recommendation: Repetitive 50 Hr inspections & removals

**Remov e**  ECi Feb 2013 recommendation: Pilots over- temp engines

**Remov e**  **@ 750 hrs**  **Group A**  **Group B Remov**  **e @ 1000**  **hrs Federal**  **Av iation**  **Ad ministration**  NTSB 2012 Safety Rec A - 12 - 7: 

# NTSB Recommendations

NTSB Meeting June 9, 2015 For Internal FAA Use Only 4 **TBO**
**1000 500**  **TIS (hrs)**

**ECi Cylinder Serial Number Repetitiv**  **e Inspections**  **33697 1**  **61 176**  **Remov e** 
**750 25526**  **25527 64016**  **Remov e;**  **or calibrate CHT ,**  **d o repetitiv** **e inspections,**  **and remov e**  **at TBO Remov**  **e**

**Remov e**  **750 25526**  **25527 Remov**  **e; or calibrate CHT**  **, d**  **o repetitiv e**  **inspections, and remov**  **e at TBO**  **Remov e** 

**7709 Repetitiv**  **e**

**Inspections, Remov**  **e @ TBO**  **No Ac**  **tion**
(2013 recommendation: Pilots over

- temp engines) (2013 recommendation: Pilots over

- engines) **52884 1043**  **No Ac**  **tion, AD**  **(but S/N 7708 separated)**  **No Ac**  **tion Repetitiv** **e**

**Inspections (R/I), Remov**  **e @ TBO**  **No Ac**  **tion, SB & SA**  **IB No**  **Ac tion**  **(except for 165 S/Ns R/I and remov** **e) 36209**  NTSB 2013 NPRM Comment Letter Recommendation:**Federal Av**  **iation Ad**  **ministration** 

# ECi NPRM, **history (cont.) NTSB recommendations.** 

NTSB Meeting June 9, 2015 For Official Use Only 5 S/N Range NTSB Reason FAA Comment 1 – 1043 Not investigated, no concerns

raised. FAA disagrees: 1) Insuf ficient head assembly interference fit. 2) 2004 AD campaigned limited s/n’s having insuf

ficient heat treat. 3) s/n 7708 failed & separated. 1044 - 7708 Already covered by FAA A D. 7709 – 33696 1) Already covered by ECi

MSB 06 - 2 50 hr repetitive compression & bubble checks for cylinders >500 hrs TIS. 2) SAIB already exists. 3) Do repetitive inspections and remove at TBO. FAA disagrees: 1) This population experiences dome radius failures <500 hrs TIS. 2) MSB 06 - 2 applies to only rev D castings... none later . 3) SAIB focuses on thin wall exhaust valve seat cracks which don’t lead to head separations... not mandated.**Federal Av**  **iation Ad**  **ministration** 

# ECi NPRM, **history (cont.) NTSB recommendations.** 

NTSB Meeting June 9, 2015 For Official Use Only 6 S/N Range NTSB Reason FAA Comment 33697 – 36209 Repetitive Inspections and

remove at TBO. FAA disagrees: 1) Probability of crack detection and/or crack propagation rate reduces effectiveness of repetitive inspections. 2) Insuf ficient head assembly interference fit. 36210 – 61 176 Apply NTSB safety rec

(repetitive inspections and removal at TBO) from 33697 to 36209 to the 165 specific serial numbers identified by ECi within this s/n range. FAA disagrees: 1) Failures are occurring, and are not limited to the 165 cylinders having interference fits <.010” 2) ECi has yet to make suf ficient design or manufacturing improvements. > 61 176 No airworthiness action

needed. FAA agrees.**Federal Av**  **iation Ad**  **ministration** NTSB 2012 NPRM Safety Rec A - 12 - 7: 

# FAA Challenge Team

NTSB Meeting June 9, 2015 For Internal FAA Use Only 7 **TBO 11**  **60 1000** **T I** **S -** **h r** **s**

**Ti me**  **- in**  **- Serv**  **ice (TIS)**  **- h**  **rs 1000**  **0 TBO**  **680 TBO**  **- 160**  SNPRM Compliance Plan

**840**

**Remov e**  **No Mandated**

**Inspections Al**  **l O/**  **H’ed Cylinders**  **Remov e**  **wi thin**  **80 h**  **rs TIS**